Samsung NX1000 User Manual page 69

The camera displays a green rectangle in places where focus is set
correctly_ The photo is divided into multiple areas, and the camera
obtains focus points of each area. It is recommended for scenery
photos.
When you press [8hutted halfway, the camera @splays the focus areas
in green as shown in the photo below.
The camera focuses on human faces preferentia!Iy_ Faces of up to
10 people can be detected. This setting is recommended for shooting a
group of people.
When you press [Shutter] halfway, the camera focuses on faces as
shown in the photo below. In cases of shooting a group of people, the
camera displays the focus on the nearest serson's face in white and the
rest of the people's faces in gray_