How do I create a link?

To create a link between two items:

1. click the first item on the Whiteboard to select it
2. hover over one of the green link arrows
3. click and drag the arrow towards the second item
4. the arrow head will snap to the second item. Release the mouse button.

To delete a link, select it and press the keyboard delete key or click the red delete icon in the upper right corner of the window.