Canon 5743B002 Instruction Manual page 59

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C.Fn-07:
You can change the flash output when firing the test flash in E-TTL II/E-TTL
autoflash mode.
0: 1/32 (1/32)
1: 1/1 (Full output)
6
C.Fn-13:
0: 4 (Speedlite button and dial)
1: 5 (Speedlite dial only)
You can perform flash exposure compensation by directly turning <9>,
without pressing the <@> button.
7
C.Fn-20: (Beep)
You can enable a beep to sound when the slave units are fully charged.
0: OFF (Disabled)
1: ON (Enabled)
<
C.Fn-22: (LCD panel illumination)
When a button or dial is operated, the LCD panel illuminates. You can
change this illumination setting.
0: 12sec (On for 12 sec.)
1: OFF (Disable panel illumination)
2: ON (Illumination always on)
(Test firing with autoflash)
(Flash exposure metering setting)
C: Setting Custom Functions
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