OM SYSTEM OM-1 Mark II Instruction Manual page 104

3.
Keeping the shutter button pressed halfway, rotate the focus ring to adjust focus manually.
To refocus using autofocus, release the shutter button and press it halfway again.
Manual focus adjustment during autofocus is not available in [
C
Manual focus adjustment during autofocus is available via the focus ring on M.ZUIKO PRO
B
(Micro Four Thirds PRO) lenses. For information on other lenses, visit our website.
4.
Press the shutter button the rest of the way down to take the picture.
Choosing a focus mode (
104
AF ] mode.
R
J
AF Mode /
K
AF
n
Mode)