Effects > Artistic > Sketch
Sketch
The Sketch filter allows you to create a sketch effect.
1. Choose Effects > Artistic > Sketch
2. Use the following options:
 Threshold
            
Threshold = 64Threshold = 128Threshold = 192
This option allows you to change the threshold value. Pixels whose grayscale value is less than or equal to a certain threshold are set to the foreground color (or primary color). Pixels whose grayscale value is bigger than a certain threshold are set to background color (or secondary color).

Min = 0, Max = 255, Default = 128.
 Color
This option allows you to select a color.
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