How do you hook up a laptop to a telly?

How can I change the display settings when I hook up my desktop monitor to my laptop?

• I use to have a desk top and it stopped working so I got a laptop and hooked up the monitor from the desk top to my laptop. When I hooked it up the first time a box came up so I could choose how I wanted to view it. It had three choices: 1. view on monitor and laptop 2. view only on monitor or 3. view some on laptop and some on moitor. and it had the option for presentation settings. I picked 1. and I turned in presentation settings. How do I change it? I figured out how to turn off presentation settings but that didnt do anything. I spent an hour trying to figure it out. Does anybody know what to do? Thanks :)

• Answer:

  if you are using windows 7, right click your desktop, select screen resolution and that will take you to the monitor settings.