The DS' top screen shows the entire canvas while the touchscreen displays a close-up view for editing.
Fatbits won't replace your copy of Adobe Photoshop, but with features like color palette mixing, variable thickness paintbrushes, and opacity sliders, the program is a lot more sophisticated than MS Paint. The application even supports an animation mode and playback for recorded sound effects (via DS mic) just like Mario Paint. Users will be able to share their complete creations or works-in-progress by uploading them to a web server with the DS' WiFi feature.
While Nintendo is aware of the project, there are no cemented plans for a commercial release. Sabistan admits that he might eventually cast the program loose for the homebrew community to play with if he is not able to find a publisher. For now, a brief user manual and a gallery of images created with Fatbits are available.