The only way I have found is to create a random .km* file in Google Earth browser (i.e. not "Pro", program). Then open this in Notepad++, & copy in the latitude, longitude, & elevations on the vertices in the format you see in the random file. I suspect this doesn't even assure a failsafe mission as some of the planned photos are not captured. The only sure way I've found to avoid that is to draw the flight plan area in the controller (i.e. no uploading of files to it). Yes, DJI still has some work to do.