I have a 42 inch Samsung Plasma TV hooked up to my Powermac g5. I'm using the tv as my monitor. I'm too close to the screen, the desktop and display is too big for me at this distance. Is there a way I could shrink the screen size within the plasma display? I already googled this and got a lot of responses to hold the control key down and scroll down to reduce the magnification; not looking to do that. I'm looking to have the screen smaller where there will be a black border around it, right now my desktop screen reaches the edges of the tv. I want to view my desktop as a 20" wide screen as opposed to a 42" wide on my 42" wide plasma. I can re-iterate my question if it doesn't make sense. Just ask, thanks!