Canon 600EXII-RT Instruction Manual page 13

Manual Flash
q : Manual flash
Stroboscopic Flash
? : Multi
(Stroboscopic)
flash
Auto/Manual External Flash Metering
/ : Auto external
flash metering
. : Manual external
flash metering
(p.40)
(p.42)
Nomenclature
Manual flash output
Number of flashes
Flash frequency
(p.45/46)
- : ISO display
ISO speed
13