How to 'ungroup' regions in ProTools?

[nilsk]

I searched the manual, chapter "working with regions" but
I didn't find how to kind of 'un-separate' regions.

... I used a drum loop for composing a song.
(Just duplicating the regions).

Now I'm ready to arrange the drum track ... but each change
happens in ALL of the regions.

... And hitting a cymbal each second bar was *not* my
intention for that song ...

=> Can anybody help?

I'd like to make 'each region an individual'.
Or 'glue' all regions as *one* drum track. ...

Thanks for helping,

Best
Nils

P.S.: Of course it's an instrument track ... using midi data ...