Nikon D3300 Reference Manual page 80

4
Adjust options.
Press 4 or 2 to choose the
orientation of the area that
will be in focus and press 1
or 3 to adjust its width.
5
Press J.
Press J to exit when settings are complete. To exit live view,
press the a button. The selected settings will continue in
effect and will apply to photographs taken using the
viewfinder.
60 Special Effects