[Inkscape-user] Connector instructions.

Are there some instructions for using these new connectors somewhere? From the screen shot, http://inkscape.org/screenshots/gallery/inkscape-0.43-diagrams.png it looks like we can 1. put arrows on the connectors and 2. force the connectors to use only horizontal and vertical (not diagonal) paths.

How do I do these things? (I'm running 0.43 grabbed from the web site.)

Thanks for any help and thanks for the great program.

-Frank