Canon Speedlite 470EX-AI Instruction Manual page 91

P.Fn-08:
U
You can set how the bounce angle is to be automatically corrected when
the orientation (position) of the camera changes during <W> AI.B full-
auto shooting or <V> AI.B semi-auto shooting.
0: Q
When the shutter button is double-clicked (pressed halfway two times
in a row within a short period), bounce angle correction is performed.
1: AUTO
When the camera's metering timer is active, bounce angle correction is
automatically performed (without pressing the shutter button halfway).
2: T
When the shutter button is pressed halfway, bounce angle correction is
performed.
When set to 1 or 2, bounce angle correction may take effect, not only when
the shutter button is pressed but also when any other button on the camera
is pressed.
(Automatic bounce angle correction)
>: Setting Personal Functions
91