On the whiteboard you can read documents and notes, watch videos, comment on documents, and download them.
A whiteboard is not limited in size. You can move around and zoom.
To move around just drag the whiteboard with the mouse.
For zooming use the mousewheel or the zoom buttons.
Hint: before using the mousewheel place the mouse pointer to the whiteboard area you're interested in.
There are buttons for viewing the full whiteboard contents and for returning to the initial view.
You can search the whiteboard content by typing into the search field.
To download a document place the mouse over it and press the Download button at the document's lower/left corner.
Use the document's Fullscreen button for comfortable reading.
To discuss the document press the speech bubble button. The discussion is displayed in the right panel then.
Editors can upload files and put new items on the whiteboard.
This is what the Add button in the whiteboard's upper/left corner is for.
It appears only if you're an editor for the current workspace.