switching log from private to public?

Hi,
So when I started, I chose the 'private' option for my log, and now that I've seen how encouraging everyone around here is, I want to make it viewable. And maybe the threat of public shame will increase my runs :-)

Is it possible to switch to publicly viewable once I've set my preferences? I don't see a 'do over' button anywhere. If anyone else has done this or knows how, let me know, eh? I'd appreciate it.

thanks,
Chris