David, on my Fn menu there's a box that shows the af mode (af-c, af-s etc). Within that option there's an MF option. I may have added that to the Fn menu though as mine is fully customised
I have the AF selector mapped to a custom button, so you can do that too.
The RX1RII has a little knob where you can toggle the AF mode. I wish they put that onto the a7 bodies too








