On the File menu, click Settings and select Black and white , Grayscale or Color.
You can toggle between the color modes by pressing B on the keyboard.
Below is an example of a color drawing.
In grayscale mode, the colors from 1 to 7 (black, red, green, blue, cyan, yellow, magenta) are shown in black, and the colors from 8 to 14 (brown, dark green, dark blue, blue-green, orange, gray) are shown in different shades of gray. Below is an example of a gray scale drawing.