E.g. I have my phone in my left hand and equipment in my right hand, I am studying the radar map and zoom in for more detail (double tap with my thumb). Then I want to zoom out again - no chance. There's no minus button, no double tap and slide - I either have to use both hands or awkwardly manage a pinch gesture with the same hand I am holding the phone.

This addition would be a huge highlight! Thanks for considering!