Drawing a realistic chalkboard.
~ Feature Description ~
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.
v1.4
✓ New feature : Feature selected image overlay.
✓ Full-Screen Support.
✓ Auto-Save Support.
✓ Window : "Zoom" Support.
✓ Change : copyright message.
✓ Minor bug fixes.
