Canon Speedlite EL-5 Advanced User's Manual page 132

4.
Configure each firing group.
On the sender, set the flash mode of each firing group.
Push the joystick straight in.
Press the joystick vertically or horizontally or turn <
firing group, then push the joystick straight in.
Setting the flash mode
Press the joystick vertically or horizontally or turn <
flash mode from < >, < >, or <
132
> to select a
> to select the
>.