FujiFilm X100F - Manual (Page 138)

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The Setup Menu
FOCUS RING FOCUS RING
Choose the direction in which the focus ring is rotated to increase the focus distance.
Options: X CW (clockwise)/Y CCW (counterclockwise)
CONTROL RING SETTING CONTROL RING SETTING
Set functions assigned to the control ring.
Options: DEFAULT/WHITE BALANCE/FILM SIMULATION/DIGITAL TELE-CONV.
AE/AF-LOCK MODE AE/AF-LOCK MODE
If AE&AF ON WHEN PRESSING is selected, exposure and/or focus will lock while the AEL/AFL button is pressed ( P 80). If
AE&AF ON/OFF SWITCH is selected, exposure and/or focus will lock when the AEL/AFL button is pressed and remain locked
until the button is pressed again.