You can't do that with LCDs. CRTs could do that because you could adjust the area of the screen where the electron guns that produced the image were pointed. LCDs work in a completely different way. You have little strips of liquid crystal that changes colors when you do specific things to it.
I have seen a few LCD monitors that allow something like what you want, but never a laptop display. With any luck, someone else may have better news for you.
One thing I can suggest, is tinkering with the aspect ratio of any movies you play back. If your laptop is widescreen (16:9 usually) and your projector is letterbox (4:3), then if you adjust the output of the video to 4:3, it should help. It just may sort of "squash" a widescreen formatted movie.
im using a widescreen laptop with an Nvidia video card (VGA out) and windows XP pro. the laptop is pretty new and i have the resolution set to 1400x900.
Problem is that I want to make the screen smaller (not the resolution) like in older CRT's. With CRT monitors you could resize the image and even move it around, but how do you do that in LCD's?
I ask cuz I made a projector using an LCD and an overhead projector, but the LCD is larger than the overhead projector pane. What this means is when i connect it to my computer, I see most of the screen, but not the sides.
When I watch widescreen movies I can fix this by displaying the movie in a smaller window rather than go full screen, but when I want to play games that can only be played in full screen, I can't see the sides of the screen due to the LCD being rectangular, and the overhead projector pane being square-ish.
The only option left is to make the rectangle image smaller so that it fits in the square, so how do I do that? Any ideas about what software I can use for this?