I am doing a photographic essay on a large church and have been given permission to use my Mavic Air to get interior shots. I put it up, but could not get it go much beyond 15 feet high. Of course, I want to be very careful and have identified all the hanging lights, the pillars etc. I have put the 'guards' back on to protect the drone and the religious items inside, but there is a spectacular set of stained glass windows above the altar which are partially obstructed by the top of the altar structure. If I can get above that altitude I can get the shots I want. I suppose the way to do that is to turn off the vertical obstacle avoidance. I am not sure how to do that, but I also want to make sure that I don't get all the way up to the roof level - there is plenty of space here. I would appreciate any tips or suggestions.