xrandr is a program that allows you to adjust screen resolutions for your monitor. * option 1: Set to a specified resolution * execute: xrandr -s 800x600 * Option 2: Set to a preset resolution (Recommended) * Execute: xrandr—verbose to see all the possible modes * Example $ xrandr --verbose SZ: Pixels Physical Refresh *0 1600 x 1200 ( 542mm x 406mm ) *60 1 1400 x 1050 ( 542mm x 406mm ) 60 2 1280 x 1024 ( 542mm x 406mm ) 70 3 1280 x 960 ( 542mm x 406mm ) 60 4 1152 x 864 ( 542mm x 406mm ) 75 5 1152 x 768 ( 542mm x 406mm ) 55 6 832 x 624 ( 542mm x 406mm ) 75 7 800 x 600 ( 542mm x 406mm ) 75 8 700 x 525 ( 542mm x 406mm ) 60 9 640 x 512 ( 542mm x 406mm ) 60 10 640 x 480 ( 542mm x 406mm ) 85 75 73 60 * Execute: xrandr -s 7 for 800x600 @ 75Hz (in this ex