Nikon D3300 - Manual (Page 188)

168 Recording and Viewing Movies
Saving Selected Frames
To save a copy of a selected frame as a JPEG still:
1
Pause the movie on the
desired frame.
Play the movie back as
described on page 162,
pressing
J to start and
resume playback and 3 to
pause. Pause the movie at
the frame you intend to copy.
2
Choose Save selected frame.
Press the
P button, then highlight
Save selected frame and press 2.
P button