This wikiHow teaches you how to resize your screen resolution on Android phones and tablets. On some Android devices, you can change the screen resolution in the Display menu in Settings. On Android devices that don't have this feature, you can change your screen resolution from developer mode. Warning: Changing settings in Developer Mode can cause permanent damage to your phone.
Steps
Method 1 of 2: Using Developer Mode

Step 1. Open Settings

on your Android.
To do this, tap the Settings app icon, which resembles a colored gear wheel.
You can also swipe down from the top of the screen and then tap the gear icon in the resulting drop-down menu

Step #2. Scroll down and tap on About this phone
You'll find this at the bottom of the Settings menu.

Step 3. Scroll down to the 'Build number' section
It's near the bottom of the About This Phone menu.
If you don't see this option, tap the icon that resembles a magnifying glass in the top right corner. Type 'Build Model' in the search bar

Step #4. Tap on Build number 7 times
This unlocks the menu Developer options. You can use the Developer option to change the resolution of your Android.
You should see a message like 'You are now a developer!' should appear once developer mode is enabled

Step 5. Tap on the 'Back' button
This will take you back to the Settings page.

Step 6. Tap Developer Options
This option would be close to the option About this phone have to stand.
On some Android phones, you have to scroll up or down to find this option

Step 7. Scroll down and tap on Smallest Width or Minimum width.
You will find this option at the bottom of the page.
This option is at the very bottom of the developer options page, so you may have to scroll down for a while before reaching it

Step 8. Enter a new width
Tap the text field in the center of the pop-up window, then type in the desired resolution width.
Android resolutions can be as low as 120 or as high as 640. The larger the number, the smaller the items on the screen (text, icons, etc.)

Step 9. Tap OK
This option is at the bottom of the pop-up window. Doing this will adjust your Android's resolution.
Method 2 of 2: Using the screen settings menu

Step 1. Open Settings

on your Androids.
It's the icon that looks like a gear. Tap the icon on your Apps menu or home screen to open the Settings menu.
You can also swipe down from the top of the screen and then tap the gear icon in the resulting drop-down menu

Step #2. Tap on Display
This option is next to an icon resembling a sun in the Settings menu.
If you don't see the Display option in your Settings menu, tap the magnifying glass icon in the top right corner and type "Display" in the search bar to search for the display settings

Step #3. Tap on Screen Resolution
This option is located in the center of the Display menu.
Not all Android phones have the option to change the screen resolution

Step 4. Tap HD, FHD, or WQHD.
HD is the lowest resolution at about 1280 x 720 pixels per square inch (PPI). FHD is a medium resolution with 1920 x 1080 PPI. WQHD is the highest screen resolution with 2560×1440 PPI.

Step 5. Tap Apply
This will apply your new screen resolution settings.
Tips
- You can change your phone's PPI with a handful of apps, but your Android must be rooted for these apps to work.
- You may notice distortion with your Android's on-screen keyboard after changing the resolution. You can install a keyboard that scales with PPI (such as GBoard) to solve this problem.
Warnings
- In some cases, changing your DPI will cause compatibility issues when using the Google Play store to download apps. If you encounter this problem, you can reset your DPI to its original settings, download the app, and then change the DPI again.
- While you can scale your phone's resolution up or down to increase or decrease the size of things on the screen, you can't increase your Android's resolution to a higher definition (e.g. from 720p to 1080p) because the definition is dictated by the physical screen of the Android itself.