How do you change screen from portrait to landscape on a PC?

Turn it on it's side.How do you change screen from portrait to landscape on a PC?
file, page setup, landscape =)- well thats on word, but i don't think you can do that for the whole screen at all times sorry =(How do you change screen from portrait to landscape on a PC?
For windows xp right click on the desktop, click graphic options, rotation and then choose the degree of rotation you want(90, 180 etc.). you can also press ctrl + alt + arrow key to change the display in your desired direction.



I think this is what you are asking.