1.   You want to use the picture side or the duck side?

2.   Make a second miter cut -- this will also bevel toward the picture side -- at the mark.

3.   Some printers left a wider border on the side or bottom of the picture side so a short message could be added.

4.   The cut should bevel in toward the picture side of the molding.

5.   The object is to whack the stack so hard that the caps flip over to reveal the picture side.