What is Standby Cue?
On the Stage Manager's computer while in Rehearsal Mode and Show Mode the top two rows under the column headers are always "Current Cue" and "Standby Cue".
On the connected users' iPads, the top two rows are also Current Cue and Standby Cue.
Each time the Stage Manager calls a Standby Cue and then clicks GO, the Standby Cue moves up to the Current Cue position on all connected screens.
This makes it very simple for the SM to call the show and keeps everyone on the same page.