Mike,

I cannot for the life of me figure out how to get the marks to show up on the border of the mirror and the actual image...  The center lines are showing up fine.  Am I missing something?

Border 1 I set to the depth of the stretcher bar say 1.5" with Canvas Edge (Mirror)
Border 2 I set to 2 with white as the color so that I know where I can cut the canvas.

Edges I set to Solid Black line with Center/Fold marks in the Border

Then I print to file just to make sure that it is doing it right and I end up with the center lines as I would expect but the fold marks are placed at the border of the Border 1 and Border 2.  For fun I tried to not use Border 2 at all and the Marks appear at the correct location but they are printed inside the image.  Having center lines appear at the edge of a Gallery wrap would not sell well.  Is this fixable?  You are so close here to perfection.

Personally I would like it to extend to the edge of Border 2, but I can live with it a shorter, just not running into the actual image that would be visible.