Canon ICAM62B Advanced User's Manual page 537

C.Fn III-2: Customize buttons
You can assign frequently used functions to buttons, such as <V> or
<B>.
Different functions, for use when shooting still photos or movies, can be
assigned to the same button.
1
Select a part of the bar.
2
Select a function to assign.
Press < 0 > to set it.
z
Custom Function Setting Items
537