Each time you use the Function button and use the up/down buttons to go to a different function, the system remembers where you are in the Function menu. The next time you press the Function button, you start out at the last function you were on, rather than at the top of the Function menu. That makes it difficult to know how many times to press the up or down button to get to a specific function without looking to see which one you're starting out on.
Fortunately, there's a way to go directly to specific functions in the menu, which is to use a button that's associated with a specific function. For example, if you press and hold the Dual button it will take you directly to the Dual Volume function. You can't shortcut directly to every function this way, but you can shortcut to whichever function is nearest in the menu, then from there you can use the up/down buttons to get to the specific function you're interested in.
I'll work on putting together a list of the functions, which ones you can shortcut directly to, and which sequence of buttons will give you the shortest path to each function.
