How do I put the day in order?

On the Schedule board, Day, press the map pin beside the tech's name. It shows once they have two or more visits that day.
The sheet shows the visits in the order that drives least, and the minutes saved against the order they are booked in.
Press Save to move the visits to the new times. Nothing moves until you do.

Worth knowing

If a visit that day changed while the sheet was open, nothing moves, and the sheet works the order out again.