Nikon D300 Complete Manual page 509

I'm in the studio using flash, I use Bank C (named Thom
Flash). Finally, when I'm shooting action, I use Bank D
(named Thom Action).
To use banks efficiently:
1. Figure out what groups of Custom Settings you use
regularly together. This is an important step. Banks
need to be assigned to groups of settings that you
know you'll always be using together, otherwise you
simply end up making individual changes to Custom
Settings in every bank, violating the whole concept. In
other words, creating banks of settings generally isn't
something you do the first day. But after a few weeks,
if you've been paying attention, you should be able to
recognize camera setups you use regularly. Good;
you're ready to create banks of Custom Settings.
2. Pick a bank. As I wrote earlier, I generally leave Bank
A alone, giving me one bank that I know I can return
to, fiddle with, and reset at will.
3. Bring up the Custom Settings menu. Use the Direction
pad to navigate to the CUSTOM SETTING menu using
the Direction pad and press the > key to get to the
options.
4. Start Bank Selection. Use the Direction pad to
navigate to Custom setting bank and press the > key
to see the options.
5. Select a bank. Use the Direction pad to navigate to the
bank you wish to modify, and press the > key to
Thom Hogan's Complete Guide to the Nikon D300
V1.02
Page 509