After seeing a comment recently about Droid Planner 2 not supporting multiple waypoint edits, I thought I would re state the feature.

Open up Droid Planner 2 and create a test set of multiple waypoints,

 make sure you are on edit mode and click and hold the waypoint from the bottom of the interface.

Once this is selected you will notice a new menu at the top of the interface.

You can now select other waypoints. Notice that they stay selected.

Click the icon that looks like two piece of paper on each other. (copy icon)

Make your edits and then click done on the left.