Annotations are persistent from session to session.
Your marks are automatically saved as long as you do not delete them.
All non-video and audio files can be annotated when shared in the room: presentations, PDF's, images, documents and spreadsheets.
By default, annotations are hidden when displaying a file.
Tip: Need graph paper background for your whiteboard? Music sheets? You can create your backgrounds on a PDF or PPT then upload them to your room. You can then use annotations as a whiteboard with different backgrounds.