Chalk
Chalk  draws soft, textured lines with porous edges. Press C to quickly access this tool.
The tool's parameters will be shown in a floating box over an image (by right-clicking the mouse) and also in the Settings Panel (only if this option is selected in Preferences). To change a parameter's setting, enter a numerical value in that parameter's box and press Enter (Macintosh: Return) or move the slider.
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Diameter (3-200). The maximum width of a line drawn by the tool (in pixels).
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Strength (0-100). The strength of the tool's influence on an image. At higher values, the line drawn by the chalk will be thicker and its edges will be sharper.
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| Strength = 5 |
Strength = 95 |
The chalk's color is set in the Color/Swatches palettes. To choose a different color bring the cursor over the spectral bar (the cursor will take the shape of a pipette) and click on the desired color or double-click on the square and choose a color from the Select Color dialog. In some cases, selecting a color is more convenient than manually selecting the components of a color via the sliders.
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— Chalk