I'm giving up looking for the .kmz file, at my skill level I cannot find the file on the RC Pro, although it's easy peasy on the 'regular' controller.
I set up a mission just using a couple of waypoints, save it, then it can be edited and waypoints added and adjusted, then renamed to suit.
I've just set up a mission using the Pro controller to photograph no fewer than 6 local ringforts and raths on one mission, and other then having to peer at the Pro screen, and dealing with the low-res satellite imagery, I found it easy to set up. I'd dearly like to be able to set up missions on my 'puter (like Litchi) and be able to do it without having to have the
M3 switched on and connected to do it, but we all have our crosses to bear,,
I set it up a mission on Litchi, which then gives me AGL heights, so I can then use this to set up the absolute altitude in the
M3 mission, it's cumbersome but it does work for me. I guess I'll be retiring my cherished Mavic pro after c. 2000km.