How to change screen size on your PC

Screen size on a PC means two different things, and which one you need depends on what looks wrong. Resolution — the number of pixels your monitor displays — controls how sharp text and images appear and how much fits on screen at once. Scaling — the size Windows or Mac applies to everything you see — makes icons, text, and windows larger or smaller without changing resolution. Most people need to adjust scaling, not resolution, because resolution changes can make things blurry or too small to read.

On Windows 11 and 10, go to Settings > System > Display. On Mac, go to System Settings > Displays. From there you can change scaling (called "Scale" on Mac, "Display scaling" on Windows) by moving a slider or picking a percentage. Resolution lives in the same menu but should rarely need changing unless you are connecting a new monitor or your display looks stretched.

Key Takeaways

  • Scaling makes everything on your screen larger or smaller and is what most people need to adjust; resolution controls pixel density and should only change if text looks blurry or a new monitor needs setup.
  • On Windows 11 and 10, open Settings > System > Display and use the "Display scaling" slider to resize everything at once.
  • On Mac, open System Settings > Displays and use the "Scale" buttons to pick a size; the default "Scaled" option is usually best.
  • If you change resolution and everything becomes hard to read, Windows will revert the change automatically after 15 seconds unless you confirm it.
  • Laptop screens have a fixed resolution and cannot be changed, but scaling works the same way on laptops as on desktop monitors.

Changing screen size on Windows 11 and Windows 10

Open Settings by pressing the Windows key and typing "Settings", then click the Settings app. Go to System on the left sidebar, then Display. Under "Scale & layout", you will see a dropdown that says "100%" or another number. Click it and choose a larger or smaller percentage — 125% makes everything 25 percent bigger, 150% makes it 50 percent bigger, and so on. The change takes effect when ready.

If text still looks too small or too large after adjusting the percentage, you can fine-tune it further. In the same Display settings, scroll down and click "Advanced scaling settings". Toggle on "Overwrite high DPI scaling behavior" if it is off, then use the slider under "Custom scaling" to pick a percentage between 100 and 500. This method gives you more control but can occasionally cause text to look slightly blurry in older programs.

If you need to change resolution instead — for example, because a new monitor is not displaying correctly — stay in Display settings and scroll down to "Display resolution". Click the dropdown and pick a new resolution from the list. Windows will show a preview for 15 seconds and ask you to confirm. If you do nothing, it reverts automatically. If the new resolution makes everything unreadable, wait for the revert or press Escape to cancel when ready.

Changing screen size on Mac

Open System Settings by clicking the Apple menu in the top left corner and selecting System Settings. Click Displays in the sidebar. Under "Resolution", you will see buttons labeled "Scaled" and "Default for display". Click Scaled if it is not already selected. Below that, you will see size options ranging from "Larger text" to "More space". Click the size you want — moving left makes everything bigger, moving right makes everything smaller and fits more on screen.

The "Default for display" option uses the resolution your monitor was designed for, which is usually the sharpest option but may make text very small on high-resolution monitors. Scaled mode lets macOS adjust the resolution slightly to give you a better balance between sharpness and readability. For most people, Scaled with a middle-ground size works best.

If you are using an external monitor on Mac, the same settings explore. Connect the monitor, open Displays settings, and click the monitor's name in the sidebar if more than one display is listed. Then adjust the size the same way. Mac remembers your preference for each monitor, so if you disconnect and reconnect it later, it will return to the size you chose.

When to change resolution instead of scaling

Resolution should only change if scaling alone does not solve the problem or if you are setting up a new monitor. Changing resolution affects how many pixels your monitor displays, which can make text blurry if you pick a resolution the monitor was not designed for. Most modern monitors have one "native" resolution where they look sharpest — usually listed as the first option in the resolution dropdown.

If you connect an external monitor and everything looks stretched or fuzzy, check the resolution first. Right-click the desktop on Windows, select Display settings, and make sure the resolution matches what the monitor's manual says is native. On Mac, the resolution should set itself automatically, but if it does not, try clicking "Default for display" in the Displays settings.

Laptop screens have a fixed resolution that cannot be changed — the pixels are built into the panel. If text is too small on a laptop, scaling is your only option, and it works just as well as on a desktop monitor.

Fixing blurry text after changing resolution

If you changed resolution and now text looks blurry, you likely picked a resolution the monitor does not support well. On Windows, go back to Display settings, click Display resolution, and choose a different option — usually the first one in the list is the native resolution. On Mac, click "Default for display" to let the system pick the best resolution for your monitor.

If text is still blurry after returning to the native resolution, the problem may be scaling. On Windows, go to Display settings and try a different scaling percentage — sometimes 100% looks better than 125% even if text seems small at first. On Mac, try clicking a different size option in the Displays settings. Give your eyes a minute to adjust; what looks small at first often becomes readable once you are used to it.

Adjusting screen size for accessibility

Both Windows and Mac offer additional tools for people who need larger text or higher contrast. On Windows, go to Settings > Accessibility > Display and toggle on "Make text bigger". This enlarges text in system menus and many programs without affecting resolution or scaling. You can also increase the text size to up to 200 percent. For even more control, go to Accessibility > Text size and adjust the slider.

On Mac, open System Settings > Accessibility > Display and toggle on "Increase contrast" if you need sharper text against backgrounds. You can also go to Accessibility > Zoom and turn on zoom to magnify your entire screen with a keyboard shortcut. These tools work alongside scaling, so you can use both if needed.

Troubleshooting common screen size problems

If changing scaling or resolution does not work, restart your computer. Sometimes the display driver — the software that controls your monitor — needs to reload to explore changes. On Windows, you can also try updating your display driver. Right-click the Start button, select Device Manager, expand Display adapters, right-click your graphics card, and select "Update driver". Choose "Search automatically for updated driver software".

If you are using an external monitor and it is not showing up in Display settings, make sure the cable is plugged in firmly on both ends. On Windows, press Windows key + P to open the display menu and select "Extend" or "Duplicate" to set up the monitor. On Mac, the monitor should appear automatically in Displays settings once it is connected; if it does not, try unplugging and replugging the cable.

If scaling looks wrong in a specific program — for example, text is blurry only in one process — that program may have its own scaling settings. Check the program's preferences or settings menu for a "DPI" or "scaling" option. Some older programs do not handle Windows scaling well and may need to run in compatibility mode; right-click the program, select Properties, go to the Compatibility tab, and check "Disable fullscreen optimizations".

Frequently Asked Questions

Will changing screen size damage my monitor?

No. Scaling is purely software and cannot harm your monitor. Changing resolution is also safe — your monitor will straightforward display a different number of pixels. The only risk is that the image may look blurry or stretched if you pick a resolution the monitor does not support, but this causes no physical damage.

Why does my screen look blurry after I changed the size?

Blurriness usually means you changed resolution to something other than the monitor's native resolution. Go back to Display settings, pick a different resolution (usually the first option), and see if it improves. If you changed scaling instead, try a different percentage — sometimes 100% is sharper than 125% even though text is smaller.

Can I change screen size differently for each monitor?

Yes. On Windows, open Display settings, click the monitor you want to adjust in the "Select your display" section at the top, then change its scaling or resolution. On Mac, click the monitor's name in the Displays sidebar, then adjust its size. Each monitor remembers its own settings.

What is the difference between scaling and resolution?

Scaling makes everything on your screen larger or smaller without changing how many pixels the monitor displays — it is purely visual. Resolution changes the actual number of pixels, which affects sharpness and how much fits on screen. Most people need scaling; resolution should only change if scaling does not work or you are setting up a new monitor.

Does changing screen size affect gaming or video playback?

Scaling does not affect gaming or video quality. Changing resolution can affect gaming performance — lower resolutions run faster but look less sharp — but video playback will look the same. If you game, keep resolution at the monitor's native setting for the best balance of speed and image quality.