Sony ILCA-99M2 Manual page 280

Sets whether or not to use autofocus when you look through an Electronic Viewfinder.
MENU →
1
Menu item details
On:
Auto focusing starts when you look through the Electronic Viewfinder.
Off:
Auto focusing does not start when you look through the Electronic Viewfinder.
[294] List of MENU items
AF Rng.Ctrl Assist (still image)
Sets whether to display or not that the subject is within the set distance during the AF range
control.
MENU →
1
Menu item details
On:
Displays the AF control assist.
Off:
Does not display the AF control assist.
[295] List of MENU items
AF Area Auto Clear
Sets whether the focus area should be displayed all the time or should disappear automatically
shortly after focus is achieved.
MENU →
1
(Camera Settings1) → [
Camera Settings1
(Camera Settings1) → [
Camera Settings1
(Camera Settings1) → [AF Area Auto Clear] → desired setting.
Eye-Start AF] → desired setting.
AF Rng.Ctrl Assist] → desired setting.