Canon SPEEDLITE EL-1 Advanced User's Manual page 189

4.
Select an item in (1).
Push the joystick up / down / left / right or turn <
and push the joystick vertically.
5.
Set the firing group.
Push the joystick to the left or right or turn <
method from the following. You can use wireless multiple flash shooting
with firing groups A, B, and C added.
• All receiver units have the same flash output:<
• Setting the flash ratio for firing groups A and B:<
• Setting the flash ratio for firing groups A, B, and C:<
189
> to select an item,
> to select the flash
>
>
>