Image library
TVPaint's Image Library will give you the ability to import, save, store images for each of your projets. You can use it to manage your resources directly in TVPaint Animation.
Rigging in TVPaint will also require you to know how to use this Library.
info
The Image Library is only available to TVPaint Professional users.
Video tutorial
Here is a video tutorial you can follow to learn how to use the Library. The Ramona Crow example project can be downloaded here.