42 Basic image processing
Comparing pre and post-correction images
Clicking the comparison display button divides the image display area in two. The original image
is on the left and the corrected image is on the right. To display the corrected image only, click
the comparison display button again.
Original image Corrected image
Changes made with the magnifying tool, grab tool, or scroll bars on one image will be applies to
the other. Using the fit-to-window button automatically resizes both images to fit the display
area.
Undoing and redoing image corrections
Click the undo button to cancel the last image correction applied to the image.
The number of image corrections that can be undone depends on the computer
memory capacity.
Click the redo button to reapply the last image correction canceled with the undo
button.
Click the reset-all button to cancel all image corrections applied to the image.
The undo, redo, and reset-all buttons only affect tools used in the image-correction tab.
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