Controller Navigation Icons Have Disappeared

Hi,

Just starting to fool around with your IDE and like it a lot. Only concern right now is that maybe it does too much. Too much stuff => it's oftentimes difficult to find what you are looking for. Like now for instance...

I really like the action <==> views navigation icons in the gutters. The only problem is that my controller icons (linking to the corresponding view) disappeared on me. Confusingly, the view icons (linking to the corresponding actions) are still visible.

I just downloaded this yesterday and am making my way through the doc and the features, so maybe I did something stupid. (OK, probably. )

Can someone tell me how to get them to re-display? I can't find a setting for this. I also tried closing and restarting the IDE and that didn't help.

Thanks,
Larry