a15: Manual Focus Ring in AF Mode

G button UA Custom Settings menu

Choose whether the lens focus ring can be used for manual focus in autofocus mode. Available with compatible lenses only.

Option	Description
[ON]	Autofocus can be over-ridden by rotating the lens focus ring (autofocus with manual override). The focus ring can be used for manual focus while the shutter-release button is pressed halfway. To refocus using autofocus, lift your finger from the shutter-release button and then press it halfway again.
[OFF]	The lens focus ring cannot be used for manual focus in autofocus mode.