Sony a7RIII Help Manual page 440

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3A
α7RIII
Phase Detect. Area
Sets whether or not to display the Phase Detection AF area.
MENU → (Camera Settings1) → [Phase Detect. Area] → desired setting.
1
Menu item details
On:
Displays the Phase Detection AF area.
Off:
Does not display the Phase Detection AF area.
Note
Phase Detection AF is available only with compatible lenses. If an incompatible lens is attached, you will be unable to use Phase
Detection AF. Phase Detection AF may not operate even with some compatible lens, such as lenses purchased in the past that
have not been updated. For details on compatible lenses, visit the Sony web site in your area, or consult your Sony dealer or
local authorized Sony service facility.
When shooting images in APS-C size, the Phase Detection AF area will not be displayed.
When recording movies, the Phase Detection AF area will not be displayed.
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