I have dug through all the literature. On my 1Dx Mark III I'd love to assign the AF Point Selection button to be controlled with the Multi-Function Lock Switch. I accidentally hit it all the time when shooting and change the Focus points. I keep trying to keep my thumb away from it, but I keep doing it. I realize I might be able to switch some button functions, but the Lock Switch would be the best for me. I don't think it's an option, just thought maybe someone knows how to do it.
