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38 Chapter 3
Fill - use this tool to apply uniform coloring to selected areas.
Using Image Enhancement History
To commit or undo your image edits (one by one or all the steps),
use the History panel in the Image Enhancement window. Once you
have modified the original image, its preview displays the changes,
but they are not done until you click the Apply button next to the
History list. Modifications not added to the History by clicking the
Add button will not be applied.
Any time you want to see what output a certain step resulted in,
double click it in the History list.
To discard changes you have performed with a given tool, but before
applying it, select the step in the list, then click the Reset button.
To restore the image as it was before you started the current
enhancement session, click the Discard all changes button.
Saving and applying templates
If you have a number of similar images to enhance, you can build up
a list of enhancement steps to apply to all of them.
3D Deskew works by snapping the distorted image to a grid. All
you need to do is to manually straighten this grid, and image
coordinates will follow - see illustration below (before - after 3D
Deskew).