Canon Speedlite 600EX-RT Instruction Manual page 73

Linked Shooting with Radio Transmission
Set the flash or transmitter to
1
normal shooting.
Press the <I> button to set to
normal flash shooting.
Check that <'> (radio transmission)
and <:> (optical transmission) are
not displayed on the LCD panel.
Set to linked shooting mode.
2
Press the <I> button continuously
until <b> is displayed on
the LCD panel.
Linked shooting mode's "Slave unit"
is set.
Press the <I> button again to set
"Master unit" of the linked shooting
mode.
Set the channel and ID.
3
Set the channel by pressing function
button 2 <C>, and set the ID by
pressing function button 3 <H>.
For details on setting, see pages 52
to 55.
Set the camera's shooting
4
functions.
71