When arranging for very large ensembles, sometimes I only see the lowest 10 staffs. Rehearsal marks are only visible on the top.
When you want to write some notes starting from a new section (with a rehearsal mark) you have to scroll up every time.
This could be solved by a visible line from top to bottom at the place of a rehearsal mark. Only in the software. It can disappear when you print the music.
Some pictures to make my point a bit more visual:
When I scroll down, there is no clue where my rehearsal mark starts.
Placing a colored line, would help!