Canon SPEEDLITE EL-1 Advanced User's Manual page 122

Memory Function
You can save the wireless settings to the sender unit and receiver unit and recall the
settings later. Operate each sender or receiver unit individually to save or recall its settings.
1.
Press the <
2.
Select < >.
• Press the joystick up, down, left, or right, or turn <
< >, then press the joystick vertically.
> button.
122
> and select