Using the wizard to create a scheduled backup, I get 5 actions per archive.
4 on the same day, and another compact a few days after.
If I want to alter the time of a backup, is there a single command or do I have to alter all 5 in the schedule (and what about the slight time variations)

Anthony Howells wrote:If I want to alter the time of a backup, is there a single command or do I have to alter all 5 in the schedule

Sorry, but you have to edit all five, or at least the ones you want to reschedule.

(and what about the slight time variations)

Actions that use the same archive are queued and run in the order they were scheduled. The one minute difference in start times ensures that actions always run in that sequence, regardless of how long the actions actually take to run.