The PowToon Library is made up of different categories of text, objects (shapes, markers), props and characters that can be added to your presentation. You can even add your own images to the library by selecting an Image Holder (image frame) option.
Using Items in the Library
To use the Library select a Style from the top of the panel. To add objects, props and characters simply drag/drop to the slide. Note: Some Items in the Library may be part of the premium PowToon package (marked as “More”).
Source: Video provided by Powtoon via their YouTube account