Here's how to change a waypoint into a shaping point and visa-versa from within a Navigator V.
Home screen
Apps
Trip planner
Trip
Blue dots (unannounced shaping points) / orange flags (announced waypoints)
Top left corner, three horizontal lines, tap on them
Edit destinations
Tap on blue dot or orange flag
A blue dot will change into an orange flag, whilst an orange flag will change into a blue dot. When changing from an orange flag into a blue dot, an additional screen will pop up. Read it and act accordingly.
You may see some recalculation. Worry about it or not as you see fit. Either way, there are loads of posts, threads and websites on the whole thorny recalculation issue.