Matthias, assuming you want to create a loop (as opposed to out and back along the same route) select your starting point and finishing point (furthest away part of the route).

Then select 'round trip'. (Directly under the Any/Paved/Gravel etc. options)

Add viapoints and locate them so that the route goes to where you want it to go.

Use existing viapoints or add new ones and use the "write a note" feature to hold whatever control point info you desire.

Alternatively, use the new ¨Marker" feature to mark off the control points.

The note viapoints (and probably Markers) should show up on a gps unit if using one, or on cue sheets if using those. I'd suggest a short test to verify how it works. 

If using the app to navigate I don't think the notes or markers are integrated yet. 

That's great, thanks for the help!!