Change the computer resolution Ubuntu

[this process was accomplished using Ubuntu 12.04 LTS]

Commands:

xrandr // get the currently display modes

xrandr --output LVDS1 --scale XxX  // scale the image

xrandr --output LVDS1 --panning 1640x922 // change the resolution output


I used this sentence:
xrandr --output LVDS1 --scale 1.2x1.2 --panning 1640x922
xrandr --output LVDS1 --scale 1x1 --panning 1366x768