I use Finale. Was very hard remembering how to do many things until I got a tip from Dr. Obvious (DOH).
Several years ago I cut a deck of colored 3x5 cards in half, associating each color with a different function like notes, etc. I tired of having to again research the SAME problem I ran into 6 months ago.
When I ran across something I couldn't do, yes I had to stop, go through the manual, online help, YouTube, post on the forum, etc.-real PITA. BUT: I would then take one of the little blank 1.5 x 2.5 cards, write on the top the task I was stumped with ("Notes-erase", "Add Staff", "Change key", etc.) followed by terse numbered steps to accomplish same.
I picked the name for the task very carefully because I then alphabetized the growing stack of cards according to the task name. As I learned the more common functions I no longer needed a reminder for I would remove them from the deck. I now have a little stack of these cards for Finale (and Cubase). And I write cross-references on them to related cards as needed.
Now when I hit a snag, I just go to my stack of cards and find out how to do it instantly. Beats the hell out of fumbling through scribbled scattered notes, or a "Help" index which should be renamed "Hindrance".
Anyway, that's my approach to so many of these music software interfaces built by room temperature I.Q. Martians. Thank you Dr. Obvious.