What's a callout?
It's a simple graphic, used to hold some text, such as a dialog for a cartoon character, or some verbalized sound effects (POW!, OUCH!, SLAM!)
Project Dogwaffle 11 includes a collection of callouts, to help you with creating illustrations with annotations.
It makes it easier to depict a dialog too, for all you cartoonists and 2D/3D illustration artists.
Here are more examples:
More samples and free giveaways for users outside of Dogwaffle 11:
more callouts and tutorials