Choose the Earlier Set Start Time command (Alt+UpArrow) to move the Set Start Time of any highlighted item that has a Set Start Time earlier in the day.
The Set Start Time changes by five minutes, unless you have enabled the Alt+ Increments 1 Minute setting (in Other Settings) in which case it changes by one minute instead.
You cannot make the Set Start Time earlier than midnight.
Related Topics
Later Set Start Time
Other Settings