How a countertop backsplash changes the slab's back extension
Learn how switching on a countertop's Back drop sets Extension Options > Back to 40 and how to bring the slab edge back to the unit's back.
Switching on a countertop's Countertop Drop > Back (a backsplash) also changes its Extension Options > Back from 0 to 40 by itself, so the slab runs 40 mm past the unit's back with the backsplash standing on that strip.
Setting Extension Options > Back to 0 brings the slab edge back to the unit's back, and the backsplash moves with it.
Switching the Back drop off returns Extension Options > Back to 0.