I have adjusted settings so that there is some similarity between the Z6ii and Z9 especially for where the Action controls are.
Z6ii has U1,U2, U3 in similar order to Z9 shooting bank set up. U2 is Action, Shooting Bank B on the Z9 is Action.
Good plan
The Z9 Action Shooting Bank (Shooting B + Custom B) for BIF is Wide Area AF, Animal priority subject recognition, 15fps, etc then Fn3 button is set to RSF (hold) @20 fps with 3d Tracking. (BTW:Fn4 takes me to top of MyMenu where subject recognition is at the top so I can use action for non BIF)
There is much more to it…..but: WideArea usually gets the subject well and switching to 3d locks onto it well. The AF ON button is handy too. I can press it briefly to confirm that 3d tracking (or Wide Area AF) is correct in its guess - seems to work.
Still a work in progress but that is the basis of it.
My set p is similar - except - I use the shutter button to activate whichever AF focus mode I have selected generally, but both AF-ON buttons are used to activate 3d-tracking. So simply finding the subject then switching to 3-d tracking is simple.
Fn2 switches to single point AF-on.
And Fn3 to recall a preset focus point - I have found saving a pre-focus point at ~5-10m helps me recover the camera if it get stuck in a complex background.
Fn1 is used for RSF(hold).
The movie record and mic buttons are used to change the general AF focus type.
Both the EV button and the unmarked FN button by the portrait shutter are used to change exposure bias.
Lens FN buttons are used to save or recall focus points.
Where possible, the role of Lens Control rings and focus rings are swapped and I use the focus ring (or control ring where new firmware has not arrived) to only change aperture values.
Where there is a 2nd Lens Control ring (400TC) I have allocated this to increase or decrease exposure bias by 1/3rd of a stop.
Fn4 recalls the top item in my menu.
These controls are set up the same way in all menu banks except (D - video) and i-menu and my menu are laid out the same too.
It is far too confusing for me to have different options between menu banks.
Works best in good light and background not too busy/distracting, but I need more opportunities to test it.
Good shooting