A brush to create an outline that looks like a sticker. It may not be the best looking or the most efficient, but it is easy to use.
1. Create two layers: one for the drawing, another for the outline. Place the outline layer below the drawing.


2. I recommend setting the color as white, though you can use another color if you want. Unfortunately there isn't a way to change the color of the actual outline.
3. Draw behind the drawing on the sticker outline layer. In order to make it so that there aren't any random black lines. (Apologies for low quality gif; i had to compress it a lot.)

4. If you want to increase the thickness/darkness of the outline, you can do so by going to the tool settings (wrench icon) and locating the "watercolor edge" settings.
Example of a sticker! (No it is not for sale, obviously.)
Also, if you wish to sell a sticker, I DO NOT recommend using this tool. It is for aesthetic purposes, mainly.
