Intersection group number is an AC8 feature that controls which layers clean up to each other. If the numbers match, they do, if not, they don't.
Draw an enlarged plan of any room that is too small to clearly display all the required dimensions, markers, and notes. Enlarging the plan also helps in calling out the interior elevations of that room.
The necessary layer and view modifications for 1/2" scale plans in current projects. These changes have already been made in the templates.