Sony ILCA-99M2 Manual page 146

[126] Shooting Face detection
Face Detection
Detects the faces of your subjects and adjusts the focus, exposure, flash settings and performs
image processing automatically.
MENU →
1
Menu item details
Off:
Does not use the [Face Detection] function.
On (Regist. Faces):
Detects the registered face with higher priority using [Face Registration].
On:
Detects a face without giving higher priority to the registered face.
Face Detection frame
When the product detects a face, the gray face detection frame appears. When the product
determines that autofocus is enabled, the face detection frame turns white. When you press
the shutter button halfway down, the frame turns green.
In case you have registered the priority order for each face using [Face Registration], the
product automatically selects the first prioritized face and the face detection frame over that
face turns white. The face detection frames of other registered faces turn reddish-purple.
Note
You cannot use the Face Detection function with the following functions:
Other zoom functions than the optical zoom
[Sweep Panorama]
[Picture Effect] is set to [Posterization].
When using the [Focus Magnifier] function.
[ Record Setting] is set to [120p]/[100p].
Up to 8 faces of your subjects can be detected.
(Camera Settings1) → [Face Detection] → desired setting.