Graphics Programs Reference
In-Depth Information
You can turn off the grid lines, or select another from the Crop tool options bar.
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To see how the existing pixels are still stored, switch to your Move tool. You will move your image
area, and then immediately undo that move so as to not change your cropped image.
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Using the Move tool ( ), click the image area and drag to reposition your image area. Notice that,
since you unchecked Deleted Cropped Pixels, the pixels still exist. Use this feature when you are not
sure if you will need to reposition an image inside of the cropped area.
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You can press Control+Z (Windows) or Command+Z (Mac OS) to undo your repositioning. If you
made several moves, you can choose Windows > History, and go back several steps by clicking Crop in
the History panel.
Go back in History to undo your moves.
Quick image correction
Anyone who has used Photoshop will tell you that there are multiple tools and features that perform the
same tasks. This is especially true when adjusting image quality. In this lesson, you will be introduced to
curves and adjustment layers, which can be as complex or as simple as you want. The approach is simple
in this lesson, but look for more advanced features that you can use with Curves in Lesson 6, “Color Cor-
recting an Image”.
Why use Adjustment layers for image correction?
Throughout this topic you find that adjustment layers are used rather than many of the menu items, which have du-
plicate features. For instance, in this lesson, you will select Curves from the Layers menu item, rather than selecting it
from the Image > Adjustments > Curves. This is because changes performed using adjustment layers can be edited
and updated, even after you save the file (in the .psd format). When using the standard Image > Adjustments menu
items, you only have the option to undo your changes, and that opportunity is lost after you perform so many other
steps, or close the file. More about adjustment layers is covered in Lesson 10, “Using Layer Styles and Adjustment
Layers.”
Increasing contrast using curves
