Show tools, colors, and palettes used in shared gallery pictures
It would be nice to see what tools a creator used through out their coloring process. For instance, it would be cool to know that the artist use the airbrush affect as their tool of choice.
What is the blur brush used for
You may like the pallet of colors and want to use them on any coloring page. It will help you locate all the colors and save you time. A link right from the pallet of colors the person used could also have a favorite link that could add it to yoru own custom pallet. Maybe allow a number of custom pallets that you can name to differentiate them.