Changing screen resolution on the fly

If you want to change your screen resolution, while still running Linux but you are not using Gnome or KDE, which gives good options to change screen resolution, you will have to use the xrandr command

If you enter it alone:

        xrandr

You will see something like this:

Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1280 x 1024
default connected 1280x1024+0+0 0mm x 0mm
1280x1024 60.0* 47.0 43.0
1024x768 85.0 75.0 72.0 70.0 60.0
800x600 85.0 75.0 72.0 70.0 60.0 56.0 100.0 90.0
640x480 85.0 75.0 72.0 60.0 120.0 100.0 90.0
1152x864 75.0 70.0 60.0 47.0 43.0
720x576 60.0
640x400 75.0 60.0
400x300 75.0 60.0
320x240 75.0 60.0
320x200 75.0 60.0

Now to change from one resolution to the other just enter and xrandr and the resolution with the -s option, like this example: