ex.factory supports the following editing operations upon the Performance Arpeggiator 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 Performance Arpeggiator to activate the Performance Arpeggiator's Context Sensitive Menu.
You can Copy/Move Performance Arpeggiators to/from Voice Arpeggiators as well as Performance Arpeggiators.
If the Performance resides in an S1A file, then a User Arpeggio from the same file can be dragged onto a Performance's Arpeggiator to set the Arpeggio used by the Performance.
Preset Arpeggios from the EX Synthesizer Window can be dragged onto a Performance's Arpeggiator as well.
Please note, the drag operation for this is COPY only. You cannot MOVE an Arpeggio onto an Arpeggiator.