A slide element is one or more shapes on a slide, that inserted from the element library into a slide in the active presentation.
The difference between the slide library and the element library is that a slide library contains whole slides for insertion, whilst the element library contains just graphics.
A slide from the slide library:
An element from the element library:
There are different types of elements available:
1. Simple icons or graphics
2. Single graphic elements
3. Graphic elements grouped together