If you find it hard to see things on your screen, Windows 11 has a tool called Magnifier that makes parts of your screen bigger. One way to use it is with the lens view, which shows a small zoomed-in area that moves with your mouse.

In this guide, you’ll learn easy steps to make that magnifier lens bigger or smaller, so it fits your needs perfectly.

What is Magnifier?

Magnifier helps you see text and pictures more clearly by zooming in on parts of your screen.

Learn more about it here: Turn On or Off Magnifier in Windows 11

How to Change the Lens Size Using Settings

Press Windows key + I to open Settings.
On the left, click Accessibility. Then, on the right, click Magnifier.
Click on the View section.
Under Change lens size, you’ll see two sliders:
- Width (bottom slider)
- Height (right slider)
Drag the sliders left or right to make the lens smaller or bigger. You’ll see the percentage number as you move the slider (default is 30%).
When you’re happy with the size, just close the Settings window.

Note: These options only work if you have selected the Lens view in Magnifier. To switch views, see: Change Magnifier View in Windows 11.

How to Change Lens Size Using the Registry Editor (Advanced)

If you want, you can also change the lens size by editing your system’s registry. But be careful—changing the registry can cause problems if done wrong. Only try this if you feel comfortable.

Press Windows key + R, type regedit, and press Enter to open Registry Editor.
In Registry Editor, go to:

Computer\HKEY_CURRENT_USER\Software\Microsoft\ScreenMagnifier
To change the lens height:
- Double-click on LensHeight in the right pane.
- Select Decimal.
- Enter a number from 10 to 100 (in steps of 10) to set the height percentage you want.
- Click OK.
To change the lens width:
- Double-click on LensWidth in the right pane.
- Select Decimal.
- Enter a number from 10 to 100 (in steps of 10) to set the width percentage you want.
- Click OK.
Close the Registry Editor when done.