There are adjusters on the analog board for raster height, width, and H & V position. They are identified by icons & arrows which indicate which way they change the picture. If you enlarge the raster a lot, you may have to tweak the focus just a bit. Somewhere around a half inch of border is normal. Computers are underscanned (entire raster fits on screen) whereas TVs are overscanned (picture bleeds off the edges of the tube). Digital TVs and DVI monitors don't need to over/underscan, since the exact number of pixels is known for both the data and display. You can get plastic TV adjusting screwdrivers at Radio Shack and other fine electronic stores, which are a good idea. They won't affect the circuits you are adjusting, and of course they don't carry electricity.