custom white balance on G7x MKII

I have now got a G7x mk1 and a mk2.    Like you am a diver and use the manual white balance ALL the time.  I am very dissapointed to say that the G7X mk2 does not give a manual white balance correction in the same way as the Mk1  - I have even put the cameras side by side and followed the process of setting the ring function button, and on the Mk2 the options are different, and it only gives the option to shortcut it to the menu where you can change with the ring.

Sadly, for marine use this does not work (ignore the sarcastic response previously, most folk who do not use a camera underwater won't  appreciate the difficulty this causes, and like you I prefer to carry a small white card when diving so I can quickly set the white balance at that depth.  For those that don't understand, the waters around the world have different colour balance in the water itself, for example temperate waters generally have a greenish tinge meanng a magenta adjust is required, whereas as tropical waters that are bluer require a red or orange adjust.

Summary, like you am a little dissappointed. I bought the second G7X to work as a back up.  It doesn't do what I want so may have to consider a change to a Mk1.  I will also drop canon a line as regards this, as it is the same on my 5D, and I also find that irritating.    Oh, and those who comment on it only takes a few moments to do it off an image should try it when diving, as by the time you've buggered about with it the fish has long gone.  I have tens of thousands of photo's of a fishes ar*e because of a split second shutter lag let alone messing with a menu!