Canon EOS 70D Instruction Manual page 44

Basic Operation
9
Multi-controller
The Multi-controller <9> has eight keys that tilt in the directions shown
by the arrows.
R Multi function Lock
With [8C.Fn III-2: Multi function lock] set and the <R> switch
set upward, it prevents the Main Dial, Quick Control Dial, and Multi-
controller from moving and changing a setting inadvertently.
If the <R> switch is set upward and you try to use one of the locked
camera controls, <L> will be displayed in the viewfinder and on the LCD
panel. On the shooting function settings display (p.45), [LOCK] will be
displayed.
44
Use the eight keys to select the AF
point, correct the white balance,
move the AF point or magnifying
frame during Live View shooting,
scroll around magnified images
during playback, etc.
For menus and the Quick Control, the
Multi-controller works only in the
vertical and horizontal directions
<V> <U>. It does not work in
diagonal directions.
<R> switch set downward:
Lock released
<R> switch set upward:
Lock engaged