Canon EOS REBEL T5I Instruction Manual page 106

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 func.].
®_ Follow step 2 on page 234 to select
[_'_], then press <_)>.
Set [Firing group] to [% (A:B)].
Set the desired flash ratio and
take the picture.
® Select [A:B fire ratio] and set the
flash ratio.
_1 If [Firing group] is Setto [=_ (AIB)], group c wil! not firel
[] The 8:i to i:ite i:8 flash raiio is equivalent to 3:1to ili to 1:3 StopS(ti2_
stop increments).
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