Nikon D5500 Reference Manual page 311

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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 and Size
Except in the case of copies created with Trim and Resize, copies
created from JPEG images are the same size as the original, while
copies created from NEF (RAW) photos are saved as large fine-quality
JPEG images.
N The Retouch Menu: Creating Retouched Copies
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