||It's really not that tough to cope the inside corners
of the room. You only need to miter one side of the corner joint. When
cutting, remember that the crown is upside down. Think of the bed of the
saw as the ceiling, and the fence as the wall. The longest point of the
miter will be against the wall.
Notice the block clamped to the bed, this keeps the trim
at the proper angle. It should be tight to the bed and fence of the saw.
Also be sure to clamp the trim to the fence while cutting, and mind were
you put your fingers, you'll need them later.