How to check per-screen scaling on a tablet

Text and buttons look too large or too small on your tablet, or a connected display seems to use a different scale. A browser check can show the screen details that the browser can access, but the result is not always the same as the scaling option in your tablet’s settings.

Use Screens to check the reported resolution and scale for each screen your browser can identify. Then compare the result with the tablet’s display settings and what you see on screen.

Check the tablet screen

1. Open Screens in the browser on the tablet you want to check.
2. Look at the screen list and note the resolution and scale shown for each screen. If the browser asks for permission to identify screens, allow it if you want to check available display details.
3. If you have an external display connected, check whether it appears as a separate screen. Compare its reported resolution and scale with the tablet’s built-in display.
4. Rotate the tablet only after noting the first result. Check the list again to see whether the reported dimensions or scale change with the orientation.

Keep the same browser and display setup for each comparison. If you change the tablet’s Display Zoom or Display size setting, reload the tool and compare again.

What the result means

The browser lists one screen

This is common on tablets. The browser may only be able to report the display used by its window, even if the operating system recognizes an external display. It does not prove that the tablet has no second display or that its display settings are wrong. Check the operating system’s display menu to confirm whether the external screen is connected and set to extend or mirror.

The screen has a scale value above 1

The browser is reporting a relationship between its page pixels and the display’s device pixels. A higher value generally means more physical pixels are used to draw one CSS pixel, the unit web pages use for layout. It is not a direct measurement of how large text looks, and it does not say whether the screen is defective.

Two screens show different values

Different screens can have different pixel densities or scaling settings. That can make text and controls appear different in size when you move a window between them. Compare each screen’s resolution and scale separately, then adjust the operating system setting for the screen that looks wrong.

The value changes after rotating the tablet

The reported width and height may swap when the display rotates. A change in those dimensions is expected. If the scale value changes too, note whether the tablet’s text and controls also look different. Browser zoom, display zoom, and how the browser handles the new orientation can affect the numbers the page reports.

The number does not match the setting you selected

The browser’s reported scale and the operating system’s accessibility or display-size setting are related, but they are not necessarily the same value. The browser can also report only part of the display information available to the operating system. Use the setting and your visual check to judge the size of text and controls, rather than expecting the numbers to match exactly.

How to fix the display size

1. Check the browser zoom. Return the page to its default zoom using the browser’s zoom controls. Page zoom changes the size of web content, not the tablet’s system-wide display scale.
2. Adjust the tablet’s display size. On iPad, open Settings › Display & Brightness › Display Zoom and choose the view that is comfortable. On many Android tablets, open Settings › Display › Display size and text › Display size. Menu names can vary by manufacturer and Android version.
3. Check the orientation and accessibility settings. Turn off magnification temporarily if the whole screen appears enlarged, then check the page again. On iPad, look under Settings › Accessibility › Zoom. On Android, look under Settings › Accessibility › Magnification. Names and locations can differ between devices.
4. Set the scale for the screen you mean to change. On a Windows 11 tablet, open Settings › System › Display, select the screen, and check Scale. On a Mac used to compare an external display, open System Settings › Displays, select the display, and choose a scaling option.
5. Reconnect an external display. Disconnect and reconnect the cable or adapter, then check the operating system’s display settings. Mirroring can make two screens show the same image, while extending uses them as separate work areas.
6. Reload the browser or restart the tablet. A page that stayed open while you changed orientation or connected a display may still show old details. Reload first, then restart if the operating system also reports the screen incorrectly.

When the screen itself may be at fault

Scaling changes the size of interface elements. It should not create permanent lines, missing areas, flickering, or patches of incorrect color. If a visual defect remains in different apps and at different display-size settings, check the screen with the tablet’s built-in diagnostics if available, or ask the manufacturer or a repair shop to inspect it. The browser test reports screen details, but it cannot diagnose panel damage.

Why tablet results can be limited

A browser does not have the same access to display controls as the operating system. Screen listing and scale details can vary by browser, tablet model, and whether a second display is attached. If the Screens tool shows only the tablet display, use the tablet’s own display settings to confirm external-screen behavior. The tool can report what the browser can see, but it cannot change the scale or prove that every screen detail is available.