Canon EOC-1DX Instruction Manual page 693

Re-Editing an Image
Only the image processing conditions are changed in images adjusted
with the tool palette (p.103 to p.110), so the "original image data itself"
remains unaffected. Also, the trimming range or dust-erasure
information of a trimmed image (p.111)
p.118) is simply saved to the image.
For this reason, you can undo any adjustments saved
image, trimming range and dust-erasure information, and revert to the
condition when last saved, or when the image was shot.
1 Select the image that is to be re-edited.
Select the [Adjustment] menu  desired item.
2
The image reverts to the conditions of the selected item.

or dust-erased image (p.114 to
(p.119) to the
Introduction
Contents at
a Glance
1
Basic
Operation
2
Advanced
Operation
Advanced 3
Image Editing
and Printing
Processing 4
Large Numbers
of Images
Editing
5
JPEG/TIFF
Images
Reference
Index
120