FujiFilm X-H1 Owner's Manual page 87

N
Button assignments can also be selected using D BUTTON/DIAL
SETTING > FUNCTION (Fn) SETTING. The selector cannot be as-
signed more than one role at a time.
EXPO. COMP., AE LOCK ONLY, AF LOCK ONLY, AE/AF LOCK, and
AF-ON cannot be assigned to the touch function buttons (T-Fn1
through T-Fn4).
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
135).
The Fn (Function) Buttons
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