motif.factory supports the following editing operations upon the Drum Voice Audition Unit Object shown within the Tree View of a Child Window:
To access all features other than Move, Copy and Set (which you do via "Drag and Drop"), right click over the Drum Voice Audition Unit to activate the Drum Voice Audition Unit's Context Sensitive Menu.
You can Copy/Move Drum Voice Audition Units to Voices and Plugin Voices.
Preset Audition Phrases from the Motif Synthesizer Window can be dragged onto a Drum Voice's Audition Unit. Please note, the drag operation for this is COPY only. You cannot MOVE an Audition Phrase onto an Audition Unit.