The library lists all items extracted from the working directory.
There are only Image items supported in the current Diaporama Maker version.
Here are 4 Image items:
4x
, 1x
) which indicates how much it has been used in the current slideshow Timeline.You can add Library images to your timeline using Drag And Drop.
You can also use the mouse to select multiple Library items, then Drag and Drop that selection to the desired Timeline place: