[nednednerb]

You might also try "Playlists" on various tracks (on the drop down selector).

In one playlist you might have all the "parts of song" like Ben describes, and you could pull from that playlist to make arrangements in a new playlist. You might then make a new one or alter that other new one to suit your interest.

It's possible to group the tracks such that they would change and create playlists together and copy and paste together, or suspend groups to change them individually. This could be tailored to suit both need and complexity of arrangements.

It might work well for you to get flexible with working with audio between playlists. There are many "shortcuts" and snappy ways to do things. Including "shuffle" which is an overall edit mode, which Ben mentioned, could play a role in moving sections between each other to other points in time.