FujiFilm X100F - Manual (Page 64)

48
Using the Function Buttons
■ 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 103).
■ MODELING FLASH
If MODELING FLASH is selected when a compatible shoe-mounted 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).