The tree view allows you to drill down into the family tree.  To expand a note, click on the '+' next to a name.  To contract a node, click on the '-' next to a name.  Your tree settings will be remembered from session to session if you allow cookies on your browser.

indicates a spouse, with children of that spouse listed directly below.
indicates a male descendant.
indicates a female descendant.

Clicking on a name will populate this frame with the descendant's details.