Determine distance between two layers in Photoshop
I have a Photoshop document with several small layers replicated in a vertical stack, each a fixed distance apart. I want to add another copy to the bottom of the stack, the same distance as the other ones, but I want it to be exact, not just eyeballed.
Is there a way I can determine the distance between two layers so I can place the new one the same distance below the last one?
I would do similar to what Joonas said in comment.
Guide to bottom edge of one object (obj 1), guide to top and bottom of the next object (obj 2).
Draw a rectangular marquee from bottom edge of obj 1 to the top edge of obj 2 then drag the marquee so the top of the marquee is at the bottom edge of obj 2. Drag a guide down. Repeat.
Might need to switch layers as you go so that it snaps to the right object.