@Michael_Oborne
Mission planner have this option to increase or decrease altitude in loiter mode with out RC transmitter involved only by GCS.
If flying in loiter and I want to increase or decrease the altitude either I have to use RC or flyhere at alt command (Guided mode) or another way using auto mode Create loiter _unlimited waypoint everytime I want upload new altitude and re-excute the mission to change effect.
Instead of this if create special widget for loiter increase/decrease by entering using mission planner will be greatly improve the system handling.
I don’t have a flyable vehicle around so I can’t test this for you.
I believe it will switch your copter to guided mode. You may switch back to loiter when it reaches the altitude.
Alvin any how it’s same procedure as I said above and when it reaches altitude it no need to change to loiter from guided .
Within loiter mode I want to change altitude and don’t want to chage lat long.