Canon EOS REBEL T4I Instruction Manual page 36

CustomWirelessFlashShooting
[% (A:B)] Multiple slave units in multiple groups
Divide the slave units into groups A and
B and change the flash ratio to obtain
the desired lighting effect.
Refer to your Speedlite's instruction
manual to set one slave unit's slave ID
to A (Group A) and the other slave unit's
ID to B (Group B) and position them as
shown in the illustration.
_ Select [Wireless rune.].
® Follow step 2 on page 230 to select
[_%], then press <_)>.
,3
Set the desired flash ratio and
take the picture.
® Select [A:B fire ratio] and set the
flash ratio.
If [Firing grOUp]is set to [% (A:B)], group c Will not fire.
[] The 8:1re !1i to 1:8 f!ash [ati0 is equiva!ent t° 311t0 !iJ t0113 Stops(112i
stop increments).
232