You edit Drummer regions in a dedicated Drummer Editor. To edit them in the Piano Roll Editor, Event List, or Step Editor, you first need to convert them to MIDI regions.
After converting a Drummer region to a MIDI region, you can convert it back to a Drummer region at a later point. However, any MIDI edits you made to the region will be lost.
Note: Drummer regions can be edited in the Tracks area in much the same way as you would edit MIDI regions, with the exception of region overlapping. When overlapping, Drummer regions always use the No Overlap drag mode.
Do one of the following:
Control-click the Drummer region, then choose Convert > Convert to MIDI Region from the shortcut menu.
The Drummer region is converted to a MIDI region, but the region remains on the Drummer track.
Drag the Drummer region to another existing track.
The Drummer region is converted to a MIDI region.
The resulting MIDI region behaves just like any other MIDI region. You can edit it in the Piano Roll Editor, Event List, or Step Editor.
Do one of the following:
If the region is on the Drummer track: Control-click the MIDI region, then choose Convert > Convert to Drummer Region from the shortcut menu.
If the region is on another track: Drag the MIDI region to the Drummer track.
The resulting Drummer region will not contain any MIDI edits you may have made.