Sony ILCA-77M2 - Manual (Page 119)

Detects a face without giving higher priority to the registered face.
Smile Shutter:
Automatically detects and shoots a smile.
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.
Tips for capturing smiles more effectively
Do not cover the eyes with front hair and keep the eyes narrowed.
Do not obscure the face by a hat, masks, sunglasses, etc.
Try to orient the face in front of the product and be as level as possible.
Give a clear smile with an open mouth. The smile is easier to be detected when the teeth are shown.
If you press the shutter button during Smile Shutter, the product shoots the image. After shooting, the
product returns to Smile Shutter mode.
Hint
When the [Smile/Face Detect.] is set to [Smile Shutter], you can select the Smile Detection Sensitivity
from [On: Slight Smile], [On: Normal Smile] and [On: Big Smile].
Note
You cannot use the Face Detection function with the following functions:
[Sweep Panorama]
[Picture Effect] is set to [Posterization].
When using the [Focus Magnifier] function.
[Cont. Priority AE]
[Scene Selection] is set to [Landscape], [Night Scene] or [Sunset].
Up to eight faces of your subjects can be detected.
The product may not detect faces at all or may accidentally detect other objects as faces in some
conditions.
If the product cannot detect a face, set the Smile Detection Sensitivity.
If you track a face using [Lock-on AF] while executing [Smile Shutter], Smile Detection is performed
only for that face.