84C: Setting Custom FunctionsC.Fn-08: I (AF-Assist beam firing)0: ON (Enabled)1: OFF (Disabled)This disables the emission of the AF-assist beam from the Speedlite.C.Fn-10: / (Receiver auto power off timer)You can change the time for the receiver unit’s auto power off to take effect.Note that when the receiver unit’s auto power off takes effect, </> isdisplayed on the LCD panel. Set this function on each receiver unit.0: 60min (60 minutes)1: 10min (10 minutes)C.Fn-11: 0 (Receiver auto power off cancel)When you press the test flash button of sender unit, you can turn on thereceiver units in the auto power off status. You can change the time for thereceiver units in auto power off status to accept this function. Set thisfunction on each receiver unit.0: 8h (Within 8 hours)1: 1h (Within 1 hour)C.Fn-13: 6 (Flash exposure compensation setting)0: 4 (Speedlite button and dial)1: 5 (Speedlite dial only)You can directly set the flash exposure compensation amount andflash output by turning <9> without pressing the <O> button of the<S> cross keys.The flash symbol displayed with C.Fn-08 set changes according to thesetting of P.Fn-05 (p.87).