Nikon D4S - Manual (Page 400)

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A
Creating Retouched Copies During Playback
Retouched copies can also be created during playback.
Display picture full
frame and hold J and
press 2.
Highlight an option
and press J.
Create retouched
copy.
D
Retouching Copies
Most options can be applied to copies created using other retouch
options, although (with the exceptions of Image overlay and Edit
movie > Choose start/end point) each option can be applied only once
(note that multiple edits may result in loss of detail). Options that can
not be applied to the current image are grayed out and unavailable.
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Image Quality
Except in the case of copies created with Trim, Image overlay, NEF
(RAW) processing, and Resize, copies created from JPEG images are
the same size and quality as the original, copies created from NEF (RAW)
photos are saved as large fine-quality JPEG images, and copies created
from TIFF (RGB) photos are saved as fine-quality JPEG images of the
same size as the original. Size-priority compression is used when copies
are saved in JPEG format.