Hi, I have been trying to assign FV Lock to a custom button on my D500. Basically to lock the flash exposure and the re compose.
My problem is that although it shows FV Lock on page 205 of the D500 manual I cannot find it anywhere on the camera menu. I also have this problem on my D810.
I also notice that the Flash Control setting on the camera menu is greyed out and I cannot access it. For info I'm using a Nikon SB910 flash unit.
I have followed the instructions in the manual but unfortunately there is simply no where in any menu that i can find FV Lock to assign to the custom settings
Probably overlooking something blatantly obvious but i simply cannot find it so any help sincerely appreciated.