How can the display resolution be changed without restarting the X Windows server?

Updated -

The xrandr utility provides this functionality. To see a list of supported resolutions that xrandr can switch to, execute the xrandr command.

A list of resolutions will be displayed:

 SZ:    Pixels          Physical       Refresh
 0   1600 x 1200   ( 363mm x 272mm )   75
*1   1280 x 1024   ( 363mm x 272mm )  *85
 2   1024 x 768    ( 363mm x 272mm )   85
 3   ...

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