Altering the Filtering Graph

The best way to start adjusting the Filtering graph is to determine the type of effect you want to create. For example, if your canvas is too dark, raise the value of the darker gray value inputs by drawing a ridge in the left side of the graph.

To alter the Filtering graph:

1. Click the Filtering tab.
   
   
2. Drag your pointer over the area of the Filtering graph you want to adjust. When you drag over a black area, the pencil draws in gray; dragging over a gray area draws in black. Tracing over any lines you've drawn erases them.
   
   

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