Nikon D7100 User Manual page 184

Choosing an AF-Area Mode
In modes other than i, the following AF-area modes can be selected in live view
(note that subject-tracking AF is not available in %, g, and u modes):
Mode
Face-priority AF: Use for portraits. The camera automatically detects and focuses on
portrait subjects; the selected subject is indicated by a double yellow border (if
multiple faces, up to a maximum of 35, are detected, the camera will focus on the
!
closest subject; to choose a different subject, use the multi selector). If the camera can
no longer detect the subject (because, for example, the subject has turned to face
away from the camera), the border will no longer be displayed.
Wide-area AF: Use for hand-held shots of landscapes and other non-portrait subjects.
$ Use the multi selector to move the focus point anywhere in the frame, or press J to
position the focus point in the center of the frame.
Normal-area AF: Use for pin-point focus on a selected spot in the frame. Use the multi
% selector to move the focus point anywhere in the frame, or press J to position the
focus point in the center of the frame. A tripod is recommended.
Subject-tracking AF: Position the focus point over your subject and press J. The focus
point will track the selected subject as it moves through the frame. To end tracking,
press J again. Note that the camera may be unable to track subjects if they move
&
quickly, leave the frame or are obscured by other objects, change visibly in size, color,
or brightness, or are too small, too large, too bright, too dark, or similar in color or
brightness to the background.
To choose an AF-area mode, press the AF-mode button and rotate the sub-command
dial until the desired mode is displayed in the monitor.
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156
AF-mode button Sub-command
Description
Monitor
dial