When I arrange a song, I cut parts and move them somewhere else.
The problem is with multi-miked instruments, typically drums.
 
It would be so great if I could put all the drums in one folder, collapse the folder
and then do all the usual editing things and all the drums stay together,
and are all moved together sample-accurate.

jpetersen 
It would be so great if I could put all the drums in one folder, collapse the folder
and then do all the usual editing things and all the drums stay together,
and are all moved together sample-accurate.

You can already split a collapsed folder track and move, copy, cut, slide, paste, etc. You can even split at selection. So maybe I don't understand what you want to do that's different.

Eli Krantzberg has an excellent chapter in the Groove 3 "Sonar X1 Tips & Tricks" video. It's called "Fun with Folders" and he packs folders and does exactly what you are referring to.  https://www.groove3.com/cakewalk-training-video-tutorials/sonar-x1-tips-and-tricks
 
Rocky

Oh, this is so embarrassing... I guess you don't know if you don't try.
But dang, isn't Sonar cool?!? Thanks for the pointers.
...now I'm gonna go find somewhere to hang my head in shame.