[feature request] page overlap mark

[msmouse]

is it possible to draw a (dotted) subtle lines to indicate an overlap with a previous page?

For example, in this, draw the red line on page 2 so that my eye can quickly identify where I should read on after turning the page.

Some good-to-have's:

1. it's not needed on page 1.
2. when the edges of the pages overlap (or better, within the error of a few pixels), omit the line. So on page 2, there's only one line at where the bottom of page 1 is, not the two lines on page 1's left and right edges.

[mbaeuerle]

Also a very interesting feature. At the moment Briss is only cropping the pages but not adding content to the PDF. Need to look into if and how that is feasible!