I'm running lyx-1.6.6.1, but haven't updated the beamer class in an tortoise's age. As I review a presentation created in 2007 I see that the navigation links along the lower right of each slide are not visible. They're apparently there since I can click in that region and move to the next section. That seems to be the only move I can make down there.
Has anyone ideas what might have happened? More important is what I should do to regain those control links. Thanks, Rich