changing screen resoultion without reboot?

[1234qwer]

can it be done? if so how might one go about doing that?

i am aware of the press F2 at bood and then type "knoppix screen=1400x1050", but if i forget to do it, or go away from the computer while it boots, it is a bit of a pain to have to restart inorder to get a decent resolution.

i am on a laptop lcd

please and thanks for any help

[OErjan]

control and + or - should work