Yeah, the manual move is what I do too, but it's just so annoying and time consuming. This is especially true for complicated things like domes!
I've been chatting with the developer over at https://www.mappingmatter.com because the software looks so good, my only hesitation is that 1) no real projector or lens libraries (yet) and 2) you can't spout / syphon in to test your Mad file (which is something I love about PixelWix / Immersive Designer Pro).
For a quick previz tool and projector positioning tool it looks very very good. Check out this 8 minute overview video, worth a watch for sure: