Upload an image or snap a photo with your device camera, then choose a canvas size. Edit your image by erasing areas, or changing the brightness or contrast. This will affect how colors are rendered in the final image. When finished editing, Select the Dab view to preview what your image will look like when hand-colored. Print out your design template. Youre ready to color! Design template color codes correspond to Dabberâ„¢ pens, available at national retailers or online.