Hello,
Not related to the problem, but in case you didn't know, you can easily take a screenshot on a mac with the shortcut Command-shift-5 (you'll have options to capture the screen, the window or a selection, and where to save...)
I use finally pause at height, it's working fine, you just has to remember that the pause is done *after* the layer you specify.
If you want to change the color for the 11th layer, you must pause at the layer 10, not at layer 11.