Canon EOS 7D - Manual (Page 176)

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Q Quick Control During Playback
To rotate an image, set [5 Auto rotate] menu to [OnzD]. If [5 Auto
rotate] menu is set to [OnD] or [Off], the [b Rotate image] setting will be
recorded to the image, but the camera will not rotate the image for display.
Pressing the <Q> button during the index display will switch to the
single-image display and the Quick Control screen will appear. Pressing
the <Q> button again will return to the index display.
For images taken with another camera, selectable functions may be
limited.