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How to change screen resolutions while in X-Windows

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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 example)


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