If you are using GPO's Basic Orchestral Percussion, there's already a cymbal roll included. It's on the space above the top line. If you hover the cursor in that space, while in Simple Entry, you can...

I say don't use staccato. See attached. If you want a more sudden attack, use an accent over the first tied note.

When I did it, I used 3 staves of 4/4, 5/8. and 7/8. I didn't change them mid-piece. All 3 parts have a tempo marking of "Measure=50." The players would have to be told what the score is so that...

Yes, they are. But they imply 2 accents. The OP wants 6 beats (maybe).

I have used the independent time signature option fairly extensively recently, and as far as I can make out, on a two or more staff piece, the program is taking its cue from the first staff and it...