Question about Foriegn Advisor screen

[bigfree1]

I can remember having seen all relationship lines visable between all known leaders at some point during a game, probably early game sometime. I know if you 'click' on a leader you'll see all the relationship lines that he/she has with you and others, but I'm sure I've seen it where you could see all of the relationship lines as if you selected every leader at once. Anybody else see this ever? How do I get it to this? Thanks.

[Gramphos]

You can select more then one leader. IIRC it is done by hodling down a key (Shift or Control, don't remember which one) when you click on the faces.