Invert the colors of an image layer

Sketching > How do I? > Organize a sketch using image layers >

In Windows > Editors > Canvas Layer Editor , choose Edit > Inver layer.

This tool inverts the RGB colors in the image. For example, red (255,0,0) becomes cyan (0, 255, 255).

This tool does not affect Shape layers.

NoteWhen applied to a mask layer, or invisibility mask layer, it swaps the masked and unmasked regions, just like Edit > Invert Mask or Edit > Invert > Invisibility Mask.

See Invert a mask.