15.7 The Modifying Tools
The three modifying tools, which are often used in photo retouching, are brush tools that transform an image rather than adding or removing color. They have all the shared options of the brush tools except for MODE, and they are affected by the current paint dynamics. They differ from the other brushes in that they use the 
key in a unique way and have a couple of additional options.
Figure 15-71. The Convolve tool icon and pointer
Figure 15-72. Options specific to the Convolve tool
Convolve and Smudge are timed tools, which ...
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