Marvin,
I was again working with my son on his cross Canada trip. One section was Lindsay ON to Cornwall but he didn't want to use the 401. Not knowing the area, I added Winchester and that looked good in MapSource (MG Can v4). But when I transferred it to MPC, the route was back on 401 with a jog to Winchester.
I got to try the Shape command. Basically you click on a location you would like the route to go through and click add (like adding a waypoint only simpler). the route then includes that point and, if you chose a good location. your route is where you want it.The advantage over adding a waypoint was you have a full screen to work with and can see immediately if your choice was successful.
As I am not entirely comfortable with the Edit command yet, this was a great solution.
Also of note;
You must disable your GPS input to view routes which don't include your present location.
Terry