Editing Masks
Icon Machine edits the icon's image and mask simultaneously. There are three editing views to choose from:
Transparency View shows the icon transparently against a patterned background. Image View shows all of the image's pixels, and uses dots to show transparency. Mask view shows just the mask, where darker pixels are more opaque.
Drawing Modes
In Transparency and Image View, all of the drawing tools affect both the image and the mask by default. You can change this by choosing from the different drawing modes.
Normal drawing mode is the default behavior of editing both the icon and the mask. Mask mode affects only the mask; Image-Only mode affects only the icon image. To quickly switch to Mask mode, hold down the Command key. To quickly switch to Image-Only mode, hold down the Command and Option keys.
Not all tools are affected by the current drawing mode. Those that do will display a different cursor for each mode: solid black for Mask mode, and hollow for Image-Only mode.
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