Cross-Staff Slurs: Enable Move function through current shortcut
The current method for utilizing a cross-staffed slur is to select with the mouse two notes on different staves, and then enter a slur. From there, the user can edit the slur graphically to taste.
The suggestion here is to allow, while editing a slur (like extending it via shift+right), allow the user to cross a grand staff just like it is done with notes. The shortcut commands are "Move up/down" for notes. Let that also work for a slur's node that is currently being moved along. This would most definitely be a +1 and can't think of any reason not to implement such an ability. It's a little idea, but could go a long way in notation editing/transcription for the keyboard user.