How to change computer screen size?

My computer screen enlarged itself, how can i shrink the screen?How to change computer screen size?
1. right click on the desktop with your mouse

2. click properties

3. where it says: themes, desktop, screensaver, etc. click on settings

4. where it says screen resolution- click on the little bar and move it to a smaller size or bigger size depending on your preference and hit apply ( or click ok it doesnt really matter )

5. enjoy your new screen size

:)How to change computer screen size?
Have your mouse on the desktop, right click, and click on properties. From there, click on the settings tab. There, you can change the screen resolution to the size you want it to be.