Nikon D5100 Reference Manual page 84

Choose the information available in the playback photo
information display (_ 124). Press • or • to highlight an
option, then press I_ to select the option for the photo
information display. A [] appears next to selected items; to
deselect, highlight and press I_. To return to the playback
menu, highlight Done and press _).
Choose whether pictures are automatically displayed in the
monitor immediately after shooting. If Off is selected, pictures
can only be displayed by pressing the I_q button.
Choose whether to rotate "tall" (portrait-orientation) pictures
for display during playback. Note that because the camera itself
is already in the appropriate orientation during shooting,
images are not rotated automatically during image review.
"Tall" (portrait-orientation) pictures are automatically rotated for display in the
On camera monitor. Pictures taken with Off selected for Auto image rotation (_ 172)
_o_ ntation. ...............................................
Off "Tall" (portrait-orientation) pictures are displayed in "wide" (landscape) orientation.
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