Sony a6500 Help Manual page 260

Help Guide
Interchangeable Lens Digital Camera
ILCE-6500
α6500
Dial / Wheel Lock
You can set whether the dial and wheel will be locked by pressing and holding the Fn (Function) button.
MENU → (Camera Settings2) → [Dial / Wheel Lock] → desired setting.
1
Menu item details
Lock:
Locks the control dial and control wheel.
Unlock:
Does not lock the control dial or control wheel even if you press and hold the Fn (Function) button.
Hint
You can release the lock by holding the Fn (Function) button down again.
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