Sony A7IV custom video rec button

[pavkung]

I've set movie rec. in video mode to do something else. Now I would like to reset its function to default, so when i press the round button with a red circle - video capture starts.
How can this be done? at this stage, I even tried factory reset, but it kept custom buttons memory. I would like to avoid camera reset and just set one button to do what it should be doing.
Cheers