A To Z Of Screen Magnification For Low Vision

When I first started learning about screen magnification for low vision and using screen magnifiers, I was overwhelmed by the sheer amount of screen magnification software options, magnification features, accessibility settings, and differences between screen magnification platforms. Screen magnification software for low vision is often designed for a specific operating system (e.g., Windows Magnifier for Windows, Zoom for MacOS), so I have had to learn how to use a mix of built-in screen magnifiers that are available on mainstream operating systems without additional downloads, as well as third-party programs like ZoomText and Fusion that have more robust display customization options. All of these tools enable me to access information with low vision, but the exact features available across platforms vary.

The best screen magnification software is the one that works for a specific individual with low vision, as visual impairment is a spectrum and not a binary. Every individual has their own access needs and access preferences for using screen magnification software, including configuring various features, customizations, and other device/application features to work seamlessly alongside screen magnifiers. These access needs and preferences may also vary depending on where the magnification software is being used, such as on a desktop or laptop computer, tablet, or on a mobile device.

Here is an A-to-Z list of features and settings commonly found in screen magnification software for low vision, along with information about how to configure specific settings or customizations for a specific screen magnification software. I included options for both built-in screen magnification software and third-party screen magnification software when available. At the bottom of the post, I also share platform-specific guides that can be used as a reference sheet.

Automatically open on start

Screen magnification software can be configured to start automatically when a device is turned on (before or after sign-in) so the magnifier is ready without needing to be opened manually each session. Many built-in magnifiers offer a dedicated option to start on the login screen, so password fields and account selection are visible right away.

Examples

Windows Magnifier: “Start Magnifier before sign-in” and “Start Magnifier after sign-in” options in Settings > Accessibility > Magnifier
macOS Zoom: Zoom can be enabled at the login window through Accessibility Options
ChromeOS: Accessibility features can be enabled on the sign-in screen so the magnifier is available before login
iOS/iPadOS and Android: Magnification features remain enabled across sessions once turned on in Accessibility settings
GNOME (Ubuntu, Fedora, and other GNOME-based Linux distributions): The Desktop Zoom switch in Settings > Accessibility > Zoom remains enabled across sessions; accessibility features can also be enabled at the GDM login screen through the Universal Access icon
KDE Plasma: The KWin Zoom desktop effect remains enabled across sessions once activated in System Settings > Desktop Effects; KMag can be added to AutoStart applications
ZoomText and Fusion: Can be configured to launch automatically when Windows starts

Browser zoom

Browser zoom is a built-in feature in web browsers like Chrome, Edge, Firefox, and Safari that enlarges the content of a single webpage without requiring a separate screen magnifier. Most browsers offer zoom up to 400% or 500% and remember the zoom level for each website. Browser zoom can be used on its own for moderate magnification needs, or alongside screen magnification software for higher levels.

Examples

Activate browser zoom by pressing Ctrl + + (Windows, Linux, ChromeOS) or Command + + (Mac), or by holding Ctrl/Command while scrolling with a mouse wheel
Pinch-to-zoom gestures on a touchscreen or trackpad can also adjust browser zoom
Most browsers include a “Default zoom” or “Page zoom” setting in preferences that applies a consistent zoom level across all websites
Mobile browsers offer a “Force enable zoom” or similar setting that allows pinch-to-zoom even on sites that try to disable it

Color filters

Color filters modify how colors appear on screen to improve clarity, increase contrast, and reduce eyestrain. Most built-in screen magnifiers (including Windows Magnifier, macOS Zoom, ChromeOS Magnifier, and Android Magnification) do not include their own color filter settings and rely on system-level options instead. Notable exceptions are iOS/iPadOS Zoom, which includes its own filters within the Zoom feature, and the GNOME magnifier, which includes color filter options for the magnified view. Third-party software such as ZoomText and Fusion offer the most extensive built-in color filter options.

Examples: Color filters within screen magnification software

ZoomText and Fusion Color Enhancement: Named modes include Normal, Invert Brightness, Invert Colors, Tint, Two-Color, Two-Color Inverted, and Replace Color. Foreground and background colors can be configured independently, and enhancements can be applied to the magnified view only, the background only, or both. The Smart Invert feature preserves the natural colors of photos when an invert mode is active in Google Chrome.
iOS/iPadOS Zoom: Four color filters accessible in Settings > Accessibility > Zoom > Zoom Filter, or by triple-tapping with three fingers and choosing Filter:
- Inverted: Light and dark colors are swapped; images may appear distorted
- Grayscale: Screen is shown in shades of gray
- Grayscale Inverted: Screen is shown in shades of gray on a dark background
- Low Light: Colors are muted and the display is dimmed
GNOME Magnifier (Linux): Settings > Accessibility > Zoom > Color Filters allows the magnified view to use inverted colors and to have its brightness, contrast, and color adjusted independently of the rest of the screen.

Examples: System-level color options

System-level color settings apply across the entire operating system and can be used alongside any screen magnifier.

Windows 11 Contrast Themes: Settings > Accessibility > Contrast themes. Four built-in themes (Aquatic, Desert, Dusk, Night Sky) can be further customized. Toggle with Left Alt + Left Shift + Print Screen.
Windows 11 Color Filters: Settings > Accessibility > Color Filters. Options include Grayscale, Inverted, Grayscale Inverted, and three color blindness filters. Toggle with Windows logo key + Ctrl + C.
macOS: System Settings > Accessibility > Display includes Grayscale, color blindness filters, Color Tint, Smart Invert, and Classic Invert.
ChromeOS: Color correction filters for protanopia, deuteranopia, tritanopia, and grayscale in Settings > Accessibility > Display and magnification, with adjustable intensity. Toggle color inversion with Ctrl + Search + H.
iOS/iPadOS: Settings > Accessibility > Display & Text Size includes Grayscale, color blindness filters, Color Tint, Smart Invert, and Classic Invert. These apply in addition to any Zoom filter selected.
Android: Color inversion and color blindness correction filters in Settings > Accessibility > Color and motion (exact path varies by device).
GNOME (Linux): High Contrast theme in Settings > Accessibility > Seeing applies a high-contrast theme system-wide.
KDE Plasma (Linux): The KWin Invert desktop effect inverts the entire screen with Meta + Ctrl + I, or the current window only with Meta + Ctrl + U.

Docked view

Docked view places the magnified content in a fixed region of the screen (usually along the top, bottom, left, or right edge) while leaving the rest of the screen at its original size. This is useful for following content while keeping the overall layout visible.

Examples

Windows Magnifier: Press Ctrl + Alt + D to switch to docked view; the magnified region appears at the top of the screen by default
ChromeOS docked magnifier: Press Ctrl + Search + D to toggle; the top portion of the screen shows the area around the cursor magnified, while the bottom remains at normal size
macOS Zoom: Split Screen style shows the magnified area along the top or bottom of the screen, similar to a docked view
iOS/iPadOS Zoom: Pinned Zoom shows the magnified view in a fixed panel. By default it is placed at the top of the screen, but can be moved to the bottom, left, or right in Settings.
Android Magnification: Partial-screen magnification shows a movable, resizable magnified window over part of the screen
KMag (KDE/Linux): Opens as a resizable, repositionable magnifier window that can be docked to any screen edge and continuously magnifies the area around the cursor
ZoomText: Offers four docked positions (top, bottom, left, right) as part of its eight available zoom window types

Eyestrain

Eyestrain and visual fatigue are common concerns for low vision users who spend long periods looking at a screen, and can vary depending on the task, environmental lighting, and the individual’s visual impairment. A low vision specialist, assistive technology specialist, or vision rehabilitation professional can help fine-tune these strategies for individual needs.

Examples

Use the lowest magnification level needed to perform a task comfortably, rather than the highest available. Higher magnification reduces the field of view and requires more frequent panning, which can increase fatigue over long sessions. Pairing a moderate magnification level with display scaling and larger system font sizes can reduce how much additional magnification is needed.
Adjust screen brightness to match the surrounding environment, as ambient room lighting that is close to screen brightness is generally more comfortable than a bright screen in a dark room. Dark mode, high-contrast themes, and color filters can also help users who are sensitive to bright white backgrounds.
Pair magnification with text-to-speech (TTS) or a screen reader to listen to content instead of reading it visually, which allows the eyes to rest. TTS can be activated as needed without requiring full screen reader navigation.
Smoothing and anti-aliasing settings keep text crisp at high magnification, reducing strain from pixelated characters. An anti-glare screen filter or matte screen protector can reduce reflections from overhead lighting and windows.
Take regular vision breaks to look away from screens and blink consciously during screen use to prevent dry eye symptoms.
Position the screen so its top edge is at or slightly below eye level, which reduces neck strain during prolonged use. For users who hold a phone or tablet close to read, a stand or mount can help maintain a comfortable posture.

Full screen

Full screen magnification enlarges the entire display uniformly. This is the default view in many screen magnifiers and works well for users who need consistent magnification across all applications, though it requires panning to see content that no longer fits in the viewable area.

Examples

Windows Magnifier: Press Ctrl + Alt + F to switch to full screen view
macOS Zoom: Full Screen is one of three zoom styles, alongside Split Screen and Picture-in-Picture
ChromeOS: Press Ctrl + Search + M to toggle the full-screen magnifier on and off
iOS/iPadOS Zoom: Full Screen Zoom magnifies the entire display; Window Zoom magnifies a resizable window instead
Android Magnification: Full-screen magnification enlarges the entire display; switch between full and partial screen in Magnification settings
GNOME Magnifier (Linux): Turning on the Desktop Zoom switch in Settings > Accessibility > Zoom magnifies the entire desktop; panning is performed by moving the mouse toward the screen edges
KDE Plasma (Linux): The KWin Zoom desktop effect provides full-screen magnification with adjustable scale factor and mouse tracking in System Settings
ZoomText: The “Full” zoom window magnifies the entire screen at the chosen magnification level

Gestures

Touch gestures provide a way to control screen magnification on touchscreen devices, tablets, and smartphones. Pinch-to-zoom is the most common magnification gesture; other gestures pan the magnified view, change zoom levels, or toggle the magnifier on and off.

Examples

Pinch-to-zoom on a touchscreen or trackpad to increase or decrease magnification or browser zoom
Windows Magnifier: Tap simultaneously on opposite screen borders (one finger on each) to zoom out to the full screen; tap the top or bottom border to pan
iOS/iPadOS Zoom: Three-finger double-tap to toggle Zoom on and off; three-finger drag to pan; three-finger double-tap and drag to change zoom level
Android Magnification: Triple-tap to toggle (if enabled); drag with two or more fingers to pan; two-finger double-tap (Android 15 and later) to toggle
ChromeOS: On touchscreen Chromebooks, two-finger drag to pan in full-screen magnification
GNOME (Linux): On devices with touch support, two-finger drag can pan the magnified view; behavior may vary by distribution and GNOME version
ZoomText: Touch Icon provides access to key magnification features using touch gestures on touchscreen Windows devices

Hotkeys/keyboard shortcuts

Keyboard shortcuts allow quick control of screen magnification without navigating through menus. Many shortcuts can be customized; the lists below cover common shortcuts for each platform.

Windows Magnifier

Turn on Magnifier / Zoom in: Windows logo key + Plus (+)
Zoom out: Windows logo key + Minus (−)
Exit Magnifier: Windows logo key + Esc
Open Magnifier settings: Windows logo key + Ctrl + M
Switch to full screen view: Ctrl + Alt + F
Switch to docked view: Ctrl + Alt + D
Switch to lens view: Ctrl + Alt + L
Cycle between views: Ctrl + Alt + M
Pan: Ctrl + Alt + Arrow keys
Zoom with scroll wheel: Ctrl + Alt + Mouse scroll wheel
Temporarily show full screen: Ctrl + Alt + Spacebar
Toggle invert colors: Ctrl + Alt + I
Resize lens: Ctrl + Alt + R (then move pointer to adjust)

macOS Zoom

Keyboard shortcuts must first be enabled in System Settings > Accessibility > Zoom > “Use keyboard shortcuts to zoom.”

Toggle Zoom on and off: Option + Command + 8
Zoom in: Option + Command + = (equals)
Zoom out: Option + Command + − (minus)
Zoom with scroll gesture: Hold the configured modifier key (Control, Option, or Command) while scrolling
Show Hover Text: Hold the modifier key configured in Hover Text settings (Command by default)

ChromeOS Magnifier

Toggle full-screen magnifier: Ctrl + Search + M (or Ctrl + Launcher + M)
Toggle docked magnifier: Ctrl + Search + D (or Ctrl + Launcher + D)
Pan in full-screen mode: Ctrl + Alt + Arrow keys (or move the mouse)
Toggle high contrast / color inversion: Ctrl + Search + H
View all keyboard shortcuts: Ctrl + Alt + /

GNOME Magnifier (Linux)

Toggle Desktop Zoom on and off (Ubuntu default): Super + Alt + 8
Pan the magnified view: Move the mouse pointer toward the screen edges
Customize the zoom shortcut: Settings > Keyboard > View and Customize Shortcuts > Accessibility > “Turn zoom on or off”

KDE Plasma Zoom (Linux)

Zoom in: Meta + Plus (+)
Zoom out: Meta + Minus (−)
Reset zoom to 1x: Meta + 0
Invert colors (entire screen): Meta + Ctrl + I
Invert colors (current window): Meta + Ctrl + U
Open KMag: Launch from the application menu (no default global hotkey; one can be assigned in KDE keyboard shortcut settings)

ZoomText

Zoom in: Caps Lock + Up Arrow
Zoom out: Caps Lock + Down Arrow
Toggle between zoom level and 1x: Caps Lock + Enter
Color enhancement on/off: Caps Lock + C
Cursor enhancement on/off: Caps Lock + R
Focus enhancement on/off: Caps Lock + F
Pointer enhancement on/off: Caps Lock + P
Smart Invert on/off: Caps Lock + I
Smoothing (xFont) mode: Caps Lock + X
Voice on/off: Caps Lock + Alt + Enter
Layered keystrokes: Press and release Caps Lock + Spacebar, then press the appropriate key (used for less common commands)

Fusion

Fusion combines ZoomText magnification hotkeys with JAWS screen reader hotkeys. The list below covers magnification commands only. Fusion supports both desktop and laptop keyboard layouts.

Zoom in / Zoom out
- Desktop: Caps Lock + Up / Down Arrow
- Laptop: Caps Lock + Alt + Up / Down Arrow
Toggle zoom and 1x
- Desktop: Caps Lock + Enter
- Laptop: Caps Lock + Alt + Enter
Color enhancement on/off
- Desktop: Caps Lock + C
- Laptop: Caps Lock + Alt + C
Show user interface
- Desktop: Caps Lock + Ctrl + U
- Laptop: Caps Lock + Ctrl + Alt + U
All magnification and speech on/off
- Desktop: Caps Lock + Ctrl + Enter
- Laptop: Caps Lock + Ctrl + Alt + Enter

iOS/iPadOS Zoom

iOS and iPadOS Zoom is primarily controlled through touch gestures. When a hardware keyboard is connected, the Accessibility Shortcut can toggle Zoom if configured in Settings > Accessibility > Accessibility Shortcut.

Toggle Zoom on and off: Three-finger double-tap
Pan: Three-finger drag
Change zoom level: Three-finger double-tap and drag up or down
Open Zoom menu: Three-finger triple-tap
Toggle via Accessibility Shortcut: Triple-click Side or Home button (if configured)

Android Magnification

Available shortcuts depend on which method is selected in Settings > Accessibility > Magnification. Multiple methods can be enabled simultaneously.

Toggle on/off (accessibility button): Tap the Accessibility button on screen
Toggle on/off (volume keys): Hold both volume keys simultaneously
Toggle on/off (triple-tap): Triple-tap the screen (must be enabled; may slow the device)
Toggle on/off (Android 15 and later): Two-finger double-tap
Pan while magnified: Drag with two or more fingers
Temporarily magnify: Triple-tap and hold, then drag

Invert colors

Inverting colors swaps light and dark values on the screen, typically showing light text on a dark background. This can be applied within the screen magnifier, as a system-wide accessibility setting, or both. Some “smart” invert options preserve the natural appearance of photos and images while inverting the rest of the interface. For detailed platform options, see the Color filters section above.

Examples

Windows: Settings > Accessibility > Color Filters > Inverted; toggle with Windows logo key + Ctrl + C
macOS: Smart Invert (preserves images) and Classic Invert in Display accessibility settings
iOS/iPadOS: Smart Invert and Classic Invert in Settings > Accessibility > Display & Text Size
Android: Color Inversion in Accessibility settings, with a quick-access shortcut option
ChromeOS: Toggle color inversion with Ctrl + Search + H
GNOME (Linux): The magnifier’s Color Filters section can invert colors within the magnified view only
KDE Plasma (Linux): Meta + Ctrl + I inverts the entire screen; Meta + Ctrl + U inverts the current window only
ZoomText: Invert Brightness and Invert Colors modes in Color Enhancement; Smart Invert preserves photo colors in Google Chrome

JAWS, screen readers, and magnification

A screen reader enables users to access text, images, and user interfaces in a nonvisual way, reading information out loud using synthesized speech and/or displaying content on a braille display. With a screen reader, users can navigate their device using a keyboard or gestures instead of using a mouse (which is inaccessible to use non-visually), though users with low vision may still use a mouse if they prefer to access information visually. Screen readers are typically “always on,” and it is reasonable to assume that someone would be unable to access their device if the screen reader was turned off. Screen magnification is sometimes paired with a screen reader for users who benefit from having content read aloud, or who experience visual fatigue from extended reading.

Examples

Fusion: Combines ZoomText magnification with the JAWS screen reader in a single installation with a shared hotkey system
SuperNova: A combined screen magnifier and screen reader from Dolphin Computer Access
The following options can be enabled simultaneously: Windows Magnifier with Narrator or NVDA; macOS Zoom with VoiceOver; ChromeOS Magnifier with ChromeVox; Android Magnification with TalkBack; iOS/iPadOS Zoom with VoiceOver.
Linux: Orca is the primary screen reader on Linux, included with GNOME and many other desktop environments. It can be used alongside the GNOME or KDE Plasma magnifier so that text is read aloud while content is magnified. Orca is launched with Super + Alt + S on most GNOME-based distributions

Keyboard focus

Keyboard focus tracking causes the magnified view to follow the keyboard focus indicator automatically, keeping the currently selected item visible when navigating with Tab, arrow keys, or other keyboard commands. This is especially useful when filling out forms or navigating menus without a mouse.

Examples

Windows Magnifier: “Have Magnifier follow” options include Mouse pointer, Keyboard focus, Text cursor, and Narrator cursor, which can be enabled in any combination
macOS Zoom: “Follow keyboard focus” option in Zoom advanced settings
ChromeOS: Full-screen and docked magnifier can follow the keyboard focus and text caret
GNOME Magnifier (Linux): Mouse tracking and magnified-view position options are in Settings > Accessibility > Zoom; focus tracking can be improved by pairing the magnifier with Orca
KDE Plasma (Linux): KWin Zoom can follow the mouse pointer; tracking settings are in System Settings
ZoomText: Focus Enhancements highlight the keyboard focus location with a colored box or underline

Lens view

Lens view creates a rectangular magnified window that follows the mouse cursor like a handheld magnifying glass. The rest of the screen stays at its original size, making it useful for quickly enlarging small sections of content without changing the overall layout.

Examples

Windows Magnifier: Press Ctrl + Alt + L to switch to lens view; lens size is adjustable in Magnifier settings
macOS Zoom: Picture-in-Picture style provides a small movable magnified window that follows the pointer
iOS/iPadOS Zoom: Window Zoom shows a resizable lens-style magnification window
Android Magnification: Partial-screen magnification provides a resizable magnified window
KMag (KDE/Linux): Functions as a fixed-position lens that continuously magnifies the area around the cursor; the window can be resized and follow-mouse mode can be toggled on or off
KDE Plasma KWin “Magnifier” effect: A fixed-size magnified window for lens-style magnification, as an alternative to the full-screen Zoom effect
ZoomText: Lens zoom window follows the mouse pointer with a resizable magnified rectangle

Magnification level (Power)

Magnification level (also called power or zoom factor) refers to how much larger items appear compared to their original 1x size. The right level depends on individual visual needs, screen size, and content type. Higher magnification is not automatically better — increasing the level reduces how much of the original screen is visible at once.

Examples

Windows Magnifier: 100% to 1600% (1x to 16x)
macOS Zoom: Up to 40x
ChromeOS Magnifier: Preset levels (2x, 4x, 6x, 8x, 10x, 12x, 14x, 16x, 18x, 20x) or a custom value
iOS/iPadOS Zoom: 1.2x to 15x, set with the Maximum Zoom Level slider
Android Magnification: Up to approximately 8x, depending on device and Android version
GNOME Magnifier (Linux): Adjusted in Settings > Accessibility > Zoom; typical maximum is around 32x depending on distribution
KDE Plasma (Linux): KWin Zoom scale factor adjusted in System Settings > Workspace Behavior > Desktop Effects > Zoom; KMag offers presets from 1.5x up to roughly 16x
ZoomText and Fusion: 1x to 60x, with Favorite Zoom Levels for switching between user-defined levels

Native (built-in) magnification applications

Native or built-in magnification applications come pre-installed with the operating system and require no additional downloads, purchases, or installations. Because they ship with the OS, they are available on locked-down computers (such as those at schools, libraries, or workplaces) where installing additional software is not permitted, and on mobile devices where third-party magnifier installations are not an option.

Examples

Windows Magnifier: Built into Windows 10 and 11; Full Screen, Lens, and Docked views; up to 1600% magnification
macOS Zoom: Built into macOS; Full Screen, Split Screen, and Picture-in-Picture styles; up to 40x
ChromeOS Magnifier: Built into ChromeOS; full-screen and docked modes with preset and custom zoom levels
iOS/iPadOS Zoom: Built into iPhone and iPad; Full Screen Zoom and Window Zoom via three-finger gestures; up to 15x
Android Magnification: Built into Android; full-screen and partial-screen modes activated by triple-tap, accessibility button, volume keys, or two-finger double-tap (Android 15 and later)
GNOME Magnifier (Linux): Built into GNOME-based distributions (Ubuntu, Fedora Workstation, Debian GNOME, and others); full-screen magnification with adjustable factor, mouse tracking, crosshairs, and color filters
KDE Plasma magnifiers (Linux): KWin’s Zoom and Magnifier desktop effects are built into KDE Plasma; KMag is a separate but officially supported KDE application available in most distribution repositories

Original view (1x)

Original view (also called 1x or normal view) is the unmagnified state of the screen. Many magnifiers include a quick way to temporarily return to 1x to get an overview of the layout before zooming back in.

Examples

Windows Magnifier: Ctrl + Alt + Spacebar temporarily shows the full screen at 1x; release to return to the previous zoom level
macOS Zoom: Toggle Zoom on and off with Option + Command + 8
ChromeOS: Press Ctrl + Search + M (or Ctrl + Search + D) to toggle the magnifier off
iOS/iPadOS: Three-finger double-tap to toggle Zoom off
Android: Use the configured shortcut (accessibility button, volume keys, or triple-tap) to toggle magnification off
GNOME (Linux): Super + Alt + 8 (Ubuntu default) toggles Desktop Zoom off
KDE Plasma (Linux): Meta + 0 resets KWin Zoom to 1x
Browser zoom: Ctrl + 0 (Command + 0 on Mac) resets to 100%
ZoomText: Caps Lock + Enter switches instantly between the magnified view and 1x

Picture/screenshot

All screen magnifiers magnify images displayed on screen in the same way they magnify text and other content. Some platforms include additional tools for viewing images at high magnification. For users that take screenshots while using the screen magnification software, most screenshot tools capture the unmagnified screen, not the magnified view; this is relevant for troubleshooting screen magnification software or documenting errors.

Examples

Windows Magnifier: In full screen mode, some screenshot tools may capture the magnified region rather than the full original screen; behavior varies by tool. Windows Magnifier is not visible in Snipping Tool, which captures the unmagnified screen.
ZoomText: Screenshots taken with tools such as Microsoft Snipping Tool capture the original unmagnified screen, not the magnified view
ZoomText screen sharing: By default, other participants in a video call see the magnified view. If this causes issues (such as a black screen), enabling the Magnification API option in ZoomText’s Display Adapter settings causes the shared screen to appear without magnification
iOS/iPadOS and Android: Screenshots capture the original unmagnified screen
macOS: Screenshots capture the original unmagnified screen
Linux: Screenshots taken with GNOME Screenshot, Spectacle (KDE), and similar tools typically capture the original unmagnified screen, since GNOME and KDE Plasma magnifiers are implemented as compositor effects applied after the screenshot is taken

Quick access

Quick access features make it possible to enable, disable, or adjust screen magnification without navigating through menus, using hotkeys, taskbar shortcuts, accessibility shortcuts, or floating toolbars.

Examples

Windows: The Accessibility flyout on the sign-in screen and the Quick Settings panel can launch Magnifier with one click
macOS: Accessibility Shortcuts panel (triple-press Touch ID or Option + Command + F5) for quickly enabling or disabling Zoom and other accessibility features
ChromeOS: Quick Settings includes an Accessibility section for toggling the magnifier; an Accessibility icon can also be shown in the system tray
iOS/iPadOS: Accessibility Shortcut (triple-click the Side or Home button) toggles Zoom if configured in Settings > Accessibility > Accessibility Shortcut; Control Center can also include accessibility shortcuts
Android: Accessibility button, Quick Settings tile, or holding both volume keys to toggle Magnification
GNOME (Linux): The Accessibility icon on the top bar provides one-click toggles for Zoom, High Contrast, and other accessibility features
KDE Plasma (Linux): KWin Zoom can be toggled with Meta + Plus / Meta + Minus without opening any menus
ZoomText: Toolbar provides one-click access to common magnifier and color enhancement settings

Resize window

Many screen magnifiers allow the magnification window to be resized in docked or lens views, giving flexibility over how much of the original screen remains visible. This can also help fit the magnifier alongside other windows during multitasking.

Examples

Windows Magnifier docked view: Drag the dock’s edge to resize
Windows Magnifier lens view: Press Ctrl + Alt + R, then move the pointer to adjust height and width
ChromeOS docked magnifier: The docked region size is set automatically; the area being magnified changes by moving the cursor or pressing Tab
Android partial-screen magnifier: Drag the edges of the magnifier window to resize
iOS/iPadOS Window Zoom: Drag the handle at the bottom of the zoom window to resize
KMag (Linux): The KMag window can be resized by dragging its borders; the area being magnified can be selected by clicking and dragging within the magnifier
ZoomText: Lens and docked zoom window sizes are adjusted through the Zoom Window settings dialog

Scaling displays

Display scaling adjusts the overall size of text, icons, and interface elements at the operating system level, independent of screen magnification software. Using display scaling alongside a screen magnifier can reduce how much additional magnification is needed and helps maintain crisp text rendering. Display scaling applies a full-screen enlargement, while screen magnification software adds view modes like Lens and Docked.

Examples

Windows: Settings > System > Display > Scale (typically 100%–350% depending on monitor resolution)
macOS: System Settings > Displays, with “Larger Text” or “More Space” presets
ChromeOS: Display size in Settings > Device > Displays, plus a separate accessibility magnifier
iOS/iPadOS: Display Zoom in Settings > Display & Brightness to enlarge the entire interface
Android: Settings > Display > Display size and text (or Font size)
GNOME (Linux): Settings > Displays includes a Scale setting (typically 100%–200%); Settings > Accessibility includes a Large Text option that scales interface text without changing icon size
KDE Plasma (Linux): System Settings > Display & Monitor includes a “Global scale” slider, plus separate font DPI settings for finer text scaling

Text to speech

Text-to-speech enables users to access text and images by reading information out loud when prompted by the user. Text-to-speech can be activated as needed using a shortcut, hotkey, or gesture. Once text-to-speech finishes reading all of the text/visible content on a page, it shuts off until the user activates it again. Text-to-speech does not use any specific gestures or require the user to change how they interact with their device. This is different from screen readers, which are typically “always on” and read additional information.

Examples

Windows: Windows Magnifier includes a built-in Read from here feature that reads on-screen text aloud without requiring a separate screen reader. Activate it from the Magnifier toolbar or by pressing Ctrl + Alt + Enter to start reading from the current cursor location, or hold Ctrl + Alt and left-click any location to start reading from there. Press any key to stop.
macOS: Speak Selection reads highlighted text.
ChromeOS: Select-to-speak (Search + S, then select text) reads highlighted content aloud
iOS/iPadOS: Speak Selection and Speak Screen read selected text or the entire screen aloud
Android: Select to Speak reads text selected on screen
Linux: Orca works alongside the GNOME and KDE magnifiers and supports multiple speech synthesizers through the speech-dispatcher service.
ZoomText Magnifier/Reader: AppReader reads documents, web pages, and email; the SpeakIt tool reads selected text

USB dongle/Portable copy

A USB dongle is a hardware device that authorizes screen magnification software to run on any computer while it is connected. A portable copy installed on a USB drive allows the software to be used on multiple computers without a full installation, with settings stored on the drive itself. This option applies to desktop and laptop magnifiers; mobile screen magnifiers are tied to the operating system.

Examples

ZoomText USB: A portable version with the same features as the installed version, including a talking setup program with large-print dialog boxes; configuration files are saved to the USB drive by default
ZoomText and Fusion dongle: The software is licensed to run on any computer while the dongle is connected
JAWS, NVDA, and other assistive technology programs also offer USB or portable versions
Linux: Most Linux distributions can be run from a live USB drive, providing a full operating system with the built-in GNOME or KDE Plasma magnifier ready to use on any compatible computer without installation
iOS/iPadOS 26 and later: Users can temporarily share their accessibility settings (including Zoom configuration) with another device in iOS 26 and later by going to Settings > Accessibility > Share Accessibility Settings

Video magnifier

Video magnifiers (sometimes called CCTVs or electronic magnifiers) are dedicated hardware devices that use a camera to magnify printed materials, distant objects, or other physical items on an external display. Some can display their feed on a computer screen alongside screen magnification software, which is useful when working with both printed and digital materials. Smartphone and tablet camera apps offer a portable alternative to dedicated hardware.

Examples

Desktop CCTVs: Stationary video magnifiers with a large monitor and camera, used for reading printed materials at high magnification
Handheld video magnifiers: Portable battery-powered devices with a small built-in screen
Distance video magnifiers: Cameras that capture content from across a room (such as a classroom whiteboard) and display it magnified on a computer screen
iOS Magnifier app: Built-in app that turns the iPhone or iPad camera into a portable video magnifier with adjustable zoom, contrast, and color filters
Android: Various camera-based magnifier apps are available through the Google Play Store; some devices also include a built-in Magnifier feature in Accessibility settings
Linux: Webcam-based camera applications such as GNOME Snapshot (GNOME) and Kamoso (KDE) can be used as basic video magnifiers when paired with a USB camera, alongside the system screen magnifier. Cheese, the older GNOME webcam app, has been discontinued and is no longer available in current Linux distribution repositories. Kamoso remains available in KDE repositories but has had minimal development activity since 2023.

Word processing

Word processing applications like Microsoft Word, Google Docs, Apple Pages, and LibreOffice Writer are commonly used with screen magnification software for writing, editing, and reading documents. Most word processors include their own zoom controls in addition to working with system-level screen magnifiers, and accessibility features like font size, line spacing, and high contrast themes can be customized within the application.

Examples

Use word processor zoom controls (View > Zoom) alongside screen magnification to fine-tune document size without changing the rest of the screen
Increase the default font size and apply accessible fonts to reduce the magnification level needed for comfortable reading
Google Docs, Microsoft Word, Apple Pages, and LibreOffice Writer all run on desktop, web, or mobile platforms, so the same document can be edited at the magnification level that works best on each device
LibreOffice Writer includes a zoom slider in its status bar and a View > Zoom dialog with custom zoom percentages and view modes such as Single Page and Book View
ZoomText’s AppReader can read aloud documents within word processing applications

eXtensions

Extensions and add-ons for screen magnification software extend or customize the behavior of the magnifier itself. The most common type is a browser extension that helps the magnifier work more accurately inside a specific browser. Some programs also include a scripting system for writing custom scripts that extend the magnifier’s behavior in specific applications. Browser extensions that add zoom or contrast features independently of a screen magnifier are a separate category and are not covered here.

Examples

ZoomText Smart Invert (Chrome extension): Designed for use with ZoomText and Fusion. When an invert color enhancement is active, this extension preserves the natural colors of photos and images in Google Chrome. Available for ZoomText and Fusion 2021 or later on Windows 10 or newer.
ZoomText Scripting: A built-in scripting system for writing custom scripts that automate or extend ZoomText’s behavior in specific applications. Scripts can be assigned hotkeys and are managed through the ZoomText Scripting dialog; documentation is included in the ZoomText User Guide.
JAWS Scripts: JAWS includes an extensive scripting system for writing application-specific scripts that extend how JAWS (and by extension Fusion) interacts with specific programs. Third-party JAWS scripts are available from developers and assistive technology vendors for a wide range of applications.
Third-party voice synthesizers: ZoomText Magnifier/Reader supports SAPI 5 compatible voice synthesizers, allowing the built-in TTS voice to be replaced with a preferred third-party voice.
GNOME Shell extensions (Linux): Community-developed extensions can extend or modify zoom and accessibility behavior — for example, adding scroll-to-zoom hotkeys to the GNOME magnifier. Installed through the GNOME Extensions website or the Extension Manager application.
KWin scripts (Linux): KDE Plasma’s KWin window manager supports user-installed scripts that can extend zoom and window management behavior; managed in System Settings > Window Management > KWin Scripts.

Y-axis magnification

Y-axis magnification refers to magnification along the vertical axis of the screen. Some screen magnifiers allow horizontal (x-axis) and vertical (y-axis) magnification to be set independently, which can be useful when visual needs differ in each direction or when enlarging text height more than width is preferred.

Examples

ZoomText and Fusion support independent horizontal and vertical magnification through their zoom level settings; asymmetric magnification can be saved as a preset in ZoomText configuration files
Adjusting only the vertical magnification can be useful for reading long lines of text without increasing horizontal scrolling
Built-in OS magnifiers (Windows Magnifier, macOS Zoom, ChromeOS Magnifier, iOS/iPadOS Zoom, Android Magnification, GNOME Magnifier, KDE KWin Zoom) generally apply uniform magnification to both axes

Zoom increments

Zoom increments refer to how much the magnification level changes each time the zoom in or zoom out command is used. A larger increment jumps between levels more quickly; a smaller increment allows finer more gradual adjustments. The default increment varies by platform and program, and many platforms allow it to be customized.

Examples

Windows Magnifier: The “Change zoom increments” dropdown in Settings > Accessibility > Magnifier controls how much the zoom level changes per keypress. Options are 5%, 10%, 25%, 50%, 100% (default), 150%, 200%, and 400%. The default of 100% doubles or halves the zoom level with each press; smaller values allow more gradual adjustment.
macOS Zoom: Each press of Option + Command + = or Option + Command + − changes the zoom level by a small fixed amount (approximately 5–10% per step). Continuous adjustment is available by holding the configured modifier key and scrolling with the trackpad or mouse wheel.
ChromeOS Magnifier: Steps through preset zoom levels (2x, 4x, 6x, 8x, 10x, 12x, 14x, 16x, 18x, 20x) using Ctrl + Alt + Brightness Up / Down. A custom zoom level can also be entered in the settings dropdown.
iOS/iPadOS Zoom: Zoom level is adjusted continuously by a three-finger double-tap and drag (up to zoom in, down to zoom out). The Maximum Zoom Level slider in Settings > Accessibility > Zoom sets the upper limit but does not control step size.
Android Magnification: Zoom level is adjusted continuously by pinching with two fingers; there is no fixed increment setting.
GNOME Magnifier (Linux): Super + Alt + = and Super + Alt + − step through the magnification factor in fixed increments (approximately 1.0x per keypress by default). The step size can be adjusted via GNOME Tweaks or the gsettings command-line tool. Super + Alt + scroll wheel provides continuous, stepless adjustment.
KDE Plasma (Linux): Meta + Plus and Meta + Minus step through zoom levels. The increment is configurable in System Settings > Workspace Behavior > Desktop Effects > Zoom; the default is approximately 1.2x per keypress (a 20% increase per step).
ZoomText and Fusion: Steps through a fixed set of zoom levels: 1x, 1.5x, 2x, 3x, 4x, 5x, 6x, 7x, 8x, 10x, 12x, 14x, 16x, 20x, 24x, 32x, 36x, 48x, and 60x. The Favorite Zoom Levels feature saves up to three preferred levels so the zoom control cycles only through those, making it faster to switch between commonly used levels.

Platform-specific resources on screen magnification for low vision (docx)

Below is a summary of this post organized by screen magnification software. Explanations of each feature are included, along with how to access available features within each screen magnifier option listed.

A to Z of Screen Magnification For Low Vision

Automatically open on start

Examples

Browser zoom

Examples

Color filters

Examples: Color filters within screen magnification software

Examples: System-level color options

Docked view

Examples

Eyestrain

Examples

Full screen

Examples

Gestures

Examples

Hotkeys/keyboard shortcuts

Windows Magnifier

macOS Zoom

ChromeOS Magnifier

GNOME Magnifier (Linux)

KDE Plasma Zoom (Linux)

ZoomText

Fusion

iOS/iPadOS Zoom

Android Magnification

Invert colors

Examples

JAWS, screen readers, and magnification

Examples

Keyboard focus

Examples

Lens view

Examples

Magnification level (Power)

Examples

Native (built-in) magnification applications

Examples

Original view (1x)

Examples

Picture/screenshot

Quick access

Examples

Resize window

Examples

Scaling displays

Examples

Text to speech

Examples

USB dongle/Portable copy

Examples

Video magnifier

Examples

Word processing

Examples

eXtensions

Examples

Y-axis magnification

Examples

Zoom increments

Examples

Platform-specific resources on screen magnification for low vision (docx)

Related posts on Veroniiiica

Use of Website as Consent to Disclaimer