Nikon Z9 Mirrorless Camera - Manual (Page 579)

579 1 The Video Recording Menu: Video Recording Options
Choose the video frame size (in pixels) and frame rate. For more
information, see the section on “Video Frame Size and Rate Options”
(
0 216) in the “Video Recording” chapter.
Choose a video crop. For more information, see the section on “Video
Image Area Options” (
0 218) in the “Video Recording” chapter.
Frame Size/Frame Rate
G button
U 1 video recording menu
Image Area
G button U 1 video recording menu