Sony a7S III Instruction Manual page 31

When focus is achieved automatically based on the whole range of the
monitor
• When you use a zoom function other than the optical zoom, the
[ Focus Area] setting is disabled and the focusing frame is shown by
the dotted line. The AF operates with priority on and around the center
area.
To move the focus area
You can move the focus area by operating the multi-selector when
[ Focus Area] is set to the following parameters:
– [Zone]
– [Spot]
– [Expand Spot]
– [Tracking: Zone]
– [Tracking: Spot S] / [Tracking: Spot M] / [Tracking: Spot L]
– [Tracking: Expand Spot]
If you assign [Focus Standard] to the center of the multi-selector
beforehand, you can move the focusing frame back to the center of the
monitor by pressing the center of the multi-selector.
Hint
• When [ Focus Area] is set to [Spot] or [Expand Spot], you can move the
focusing frame over a greater distance at a time with the multi-selector by
setting [ AF Frame Move Amt] to [Large].
• You can move the focusing frame quickly by touching and dragging it on
the monitor. Set [Touch Operation] to [On] and [Touch Func. in Shooting] to
[Touch Focus] beforehand.
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