How to Change the Magnifier Lens Size in Windows 11

What is Magnifier?

Magnifier helps you see text and pictures more clearly by zooming in on parts of your screen. Why use it? If you have trouble seeing small text or details, this tool makes them larger and easier to read.

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

How to Change the Lens Size Using Settings

This is the easiest way to adjust your lens size.

1. Press Windows key + I to ⚙️ open Settings.
2. On the left, click Accessibility. Then, on the right, click Magnifier.
3. Click on the View section.
4. Under Change lens size, you’ll see two sliders:

   • Width (bottom slider)
   • Height (right slider)
5. 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%). What happens when you adjust it? The lens size changes in real time so you can see the effect right away.
6. 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 working with your computer’s advanced settings.

1. ⚠️ Admin Privileges Required: Press Windows key + R, type regedit, and press Enter to open Registry Editor.
2. In Registry Editor, go to: Computer\HKEY_CURRENT_USER\Software\Microsoft\ScreenMagnifier
3. 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.
4. 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.
5. Close the Registry Editor when done.

Tip: Changing these values lets you customize the size exactly how you like it.

More Help and Info

Want to learn more about Magnifier and other ways to make your screen easier to see? Check out this official Microsoft page: Use Magnifier to make things on the screen easier to see – Microsoft Support

Summary

Changing the magnifier lens size in Windows 11 is simple. You can use the Settings app to drag sliders and adjust the lens width and height to what works best for you. Why do this? A bigger or smaller lens helps you see exactly what you need without having to zoom your entire screen. For advanced users, you can also edit the registry at HKEY_CURRENT_USER\Software\Microsoft\ScreenMagnifier to set custom values. Just remember to be careful when working with the registry, as incorrect changes can cause issues.