Samsung EV-NXF1ZZB1QUS - Manual (Page 79)

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Shooting Functions >
AF area
Multi AF
The camera displays a green rectangle in places where focus is set
correctly. The photo is divided into two or more areas, and the camera
obtains focus points of each area. It is recommended for scenery photos.
When you press [Shutter] halfway, the camera displays the focus areas as
shown in the photo below.