Drawing a realistic chalkboard. ~ Feature Description (Lite Version) ~ 1. Chalks : Switching 3-color Chalk. 2. Remover : Clearing the canvas or drawing line. 3. Backboard : Switching Background Board. 4. Camera : Saving Pictures folder to the canvas. ~ Feature Description (Full Version) ~ 1. Chalks : Switching 7-color Chalk. 2. Remover : Clearing the canvas or drawing line. 3. Backboard : Switching Background Board. 4. Camera : Saving Pictures folder to the canvas. 5. Album : Save / Load / Remove the picture. 6. Overlay : Open overlay image file.