Altitude display on Mission Planner

I’m designing a plane who’s main purpose is to glide. It needs to achieve some altitude before it can glide so it has a motor. I have a basic simple system setup with a F405-WSE.

I want to achieve as much altitude as possible so I can glide and test out different angle of attacks given the planform to determine with testing how glide ratio is effected.

I have altitude displaying in Mission Planner, my question is: would it be possible to display just a static altitude number for when the motor is cutoff and the plane starts gliding?