Find more symbols by clicking the Library Selector, choosing More..., and browsing or searching the symbol libraries in the More Symbols dialog.
Add your own images by clicking the Insert tab at the top of the screen and then clicking Picture. Browse to the image on your computer using the dialog and click Open.
Some SmartPanels also have a button for inserting a picture.
The Insert tab also has controls for inserting other items such as tables, charts, and maps.