Nikon D3300 - Manual (Page 174)

154 Live View
A Manual Focus
To focus in manual focus mode ( 0 83),
rotate the lens focus ring until the subject is
in focus.
To magnify the view in the monitor up to about 8.3 × for precise focus,
press the
X button. While the view through the lens is zoomed in, a
navigation window will appear in a gray frame at the bottom right
corner of the display. Use the multi selector to scroll to areas of the
frame not visible in the monitor (available only if
7 (Wide-area AF) or
8 (Normal-area AF) is selected for AF-area mode), or press W (Q) to
zoom out.
X button Navigation window