While running Phandelver and Below: The Shattered Obelisk I decided to forgo drawing the Wave Echo caves and put the map on the TV in my game room via iPad screen share to my Apple TV box.
I had the map up in Affinity Designer 2 so I could cover undiscovered parts of the map. But no matter what I did I could not get the screen to zoom in on any part of the map image, it only showed the full map on the screen.
I know I can purchase the module on roll20, or I can put the map in and draw on it to hide sections. But I am hoping for something more on the fly. I would prefer to use my iPad rather than my MacBook since it is more portable if possible.
I use https://owlbear.rodeo/ for that. It allows you to cast your map to a 2nd screen in player mode, while you can still see the full picture. It has ‘fog’ to hide areas from the players and supports zooming in on each screen separately, or you can sync zoom&view (manually or continuously) from your dm screen
This looks interesting. I was able to get a map into it, now trying to set up the fog.