Question with adding targets and waypoints

It is not...but you can delay and then start moving but you can't delay after you start unless you manually do it.

Riverwolf is correct, I think.

You can add a delay to the beginning of that process, but you cannot add delays in the middle of it.

The delay button only adds a pause before beginning a movement order.

For bombardment units such as artillery there are multiple fire control features available to high command subscribers which enable you to select different movement behavior.

Thank you all for your replies, I appreciate your answers.

One of the often overlooked features of delay is the ability to coordinate the arrival time of multiple groups.

Select multiple groups, give them a move or attack order, then select delay. Accept the suggested time and all units will arrive at their destination simultaneously. (Note that if province ownership changes during the trip, arrival time will be affected)