FujiFilm GFX 50S - Manual (Page 181)

163
T
he S
etup M
enus
8
BUTTON/DIAL SETTING
AF-ON
If AF-ON is selected, you can press the control instead of keeping
the shutter button pressed halfway.
MODELING FLASH
If MODELING FLASH is selected when a compatible shoe-mount-
ed fl ash unit is attached, you can press the control to test-fi re the
fl ash and check for shadows and the like (modeling fl ash).
TTL-LOCK
If TTL-LOCK is selected, you can press the control to lock fl ash
output according to the option selected for
F FLASH SETTING >
TTL-LOCK MODE (
P
114).