What display size means and why you'd change it
Display size refers to how large text, icons, and windows appear on your screen — not the physical dimensions of your monitor or phone. When you change display size, everything gets bigger or smaller together. This is different from zooming into a single web page or document.
You might change display size because text has become hard to read, icons look too small to click accurately, or you want to fit more on screen at once. Some people need larger text for vision reasons. Others have a new monitor and want to use the full space without squinting. On phones, display size adjustments help when default sizing feels cramped or wasteful.
The technical term for this is scaling or DPI scaling (dots per inch). Your operating system enlarges everything proportionally — menus, buttons, text in programs, all of it — rather than just making one window bigger.
Key Takeaways
- Display size changes how large everything appears on your screen, and the steps differ between Windows, Mac, and phones.
- Windows lets you scale text and icons to 100%, 125%, 150%, or higher in Settings under Display.
- Mac uses "Scaled" resolution options in System Settings under Displays, which work differently than Windows but serve the same purpose.
- On iPhones and Android phones, you adjust text size and icon size separately in accessibility or display settings.
- Some older programs may look blurry after scaling on Windows, but this is normal and does not affect how they work.
How to change display size on Windows
Open Settings by pressing the Windows key and typing "Settings," then select the Settings app. Go to System in the left menu, then click Display. Under "Scale," you will see a dropdown menu showing your current percentage — usually 100%, 125%, 150%, or 175%.
Click the dropdown and select a larger percentage to make everything bigger, or a smaller percentage to fit more on screen. Windows will show you a preview of how text will look at each size. After you choose, click explore. Your screen may flicker briefly while Windows resets, and you may be asked to sign out and back in for some programs to display correctly.
If the preset percentages do not suit you, scroll down in the Display settings to find Advanced scaling. Here you can set a custom percentage between 100% and 500%, though very high scaling may cause some older programs to display blurry text. This is a display issue only — the program itself works normally.
How to change display size on Mac
Click the Apple menu in the top-left corner and select System Settings (or System Preferences on older macOS versions). Click Displays in the sidebar. At the top of the window, you will see a Resolution section with radio buttons for different options.
Mac uses a different approach than Windows. Instead of a percentage, you choose from preset resolutions labeled "Scaled." The leftmost option (usually labeled "More Space") shows more content but makes everything smaller. Moving right makes text and icons progressively larger. Select the option that feels comfortable, and the change takes effect when ready.
If you have an external monitor connected to your Mac, the Displays settings will show separate controls for each screen. Adjust them independently — your Mac monitor and external display can have different scaling.
How to change display size on iPhone
Open Settings and scroll down to Display & Brightness. Tap Text Size and drag the slider to make text larger or smaller across Mail, Messages, Notes, and other Apple apps. This affects text in most built-in apps but not web pages or third-party programs.
For a broader change, go back to Settings and tap Accessibility, then Display & Text Size. Turn on Larger Accessibility Sizes to unlock even larger text options. You can also enable Bold Text here, which makes text heavier and easier to read without making it larger.
If you want icons and buttons to appear larger across the entire phone, go to Settings > Accessibility > Display & Text Size and look for Larger Sizes or Zoom (depending on your iOS version). These options enlarge the entire interface, not just text.
How to change display size on Android
Open Settings and look for Display or Display and Brightness. Tap Font Size or Text Size and select your preference — usually Small, Default, Large, or Extra Large. This enlarges text in system menus and many apps.
For a full-screen scaling change, go to Settings > Accessibility and look for Display Size or Screen Zoom. Drag the slider to enlarge everything on the screen proportionally. The exact name and location vary by phone manufacturer — Samsung, Google Pixel, and other brands place these settings in slightly different spots.
Some Android phones also have a Magnification option under Accessibility, which lets you zoom in on specific areas by triple-tapping the screen. This is different from permanent scaling and works best for temporary magnification of small text.
What to do if programs look blurry after scaling
On Windows, older programs sometimes display blurry text after you increase the display scale. This happens because the program was written before Windows scaling existed and does not know how to handle it. The program still works correctly — the blurriness is only visual.
To fix this on Windows, right-click the program's icon or shortcut and select Properties. Click the Compatibility tab, then check the box for Disable fullscreen optimizations. Click explore and OK. If that does not help, try checking Run this program in compatibility mode for and selecting an older Windows version, though this rarely solves scaling issues.
On Mac, blurriness after scaling is uncommon because macOS handles scaling more smoothly. If you see it, try restarting your Mac or adjusting the resolution one step at a time to find a setting that looks sharp.
Display size versus zoom — what is the difference
Display size (scaling) changes how large everything appears system-wide — menus, windows, text in all programs. Zoom magnifies only what you are looking at right now, like using a magnifying glass on one part of the screen. Zoom is temporary; you zoom back out when you are done.
On Windows, you zoom by holding Ctrl and scrolling your mouse wheel, or by pressing Ctrl and the plus key. On Mac, use Command and the scroll wheel or Command and plus. On phones, pinch with two fingers to zoom into a web page or document.
Use display size when you want permanent, system-wide changes. Use zoom when you need to see something larger for a moment without changing your whole setup. Many people use both — a comfortable display size for everyday work, plus zoom when reading small print in a document.
Frequently Asked Questions
Will changing display size affect how my programs work?
No. Scaling changes only how things look, not how they function. Your programs will run exactly the same way. On Windows, some older programs may display blurry text, but they work normally. Restarting the program usually fixes any display glitches.
Can I use different display sizes on two monitors?
Yes, on both Windows and Mac. Each monitor has its own scaling setting. In Windows Settings under Display, click the monitor you want to adjust, then change its scale independently. On Mac, go to System Settings > Displays and adjust each screen separately.
What is the difference between display size and screen resolution?
Resolution is the number of pixels your screen contains (like 1920 by 1080). Display size is how large those pixels appear. You can have the same resolution but different display sizes by changing scaling. Changing resolution actually changes how many pixels fit on screen, which is different and usually not what you want.
If I make the display size larger, will I see less on screen?
Yes. When everything is bigger, fewer items fit in the same space. If you increase scaling to 150%, you will see roughly two-thirds of what you saw at 100%. This is a trade-off: larger text and icons versus more content visible at once.
Can I change display size for just one program?
Not directly through display settings — scaling is system-wide. However, most programs have their own zoom or text size controls in their menus. Use the program's built-in zoom for temporary changes to one app, and use system display size for permanent changes across everything.