Nikon Z9 Mirrorless Camera - Manual (Page 129)

129 Focus
Manual Focus
Manual focus is available in manual focus mode. Use manual focus
when, for example, autofocus does not produce the desired results.
• Position the focus point over your subject
and rotate the focus or control ring until the
subject is in focus.
• For greater precision, press the X button to
zoom in on the view through the lens.