seeking help volume control of split

[sugarplumsss]

I have a few gigs on clavinova
i have the digital manual. but it's a major struggle for me

I am playing left hand bass on the clav
piano right side

how to choose the piano sound on right and acoustic bass on left side of piano ?
how to choose split point ( i've forgotten how )
how to change octave of each side ( i likely won't have to but just in case )
can i modify the volume balance between left and right side ?
is it possible to save the settings
the manual says a variety of clavanova
from CLP 785 to 765
my bandleader downloaded the manual

they say helping others is the way to our own happiness !! 🥸
thank you all and Here's to a positive new year