Screen resolution refers to the clarity of the text and images displayed on your screen. At higher resolutions, such as 1920 x 1080 pixels, items appear sharper. They also appear smaller so more items can fit on the screen. At lower resolutions, such as 800 x 600 pixels, fewer items fit on the screen, but they appear larger. It is measured horizontally and vertically in pixels. In this article, we will review three methods which you can use to change the screen resolution in Windows 10 including the GUI, and from the command line.