Every once in a while, my Mains disappear (I probably toggle out of them somehow), and I can't get them back.  I usually see them in with my buses in the Console view, or in the Inspector, but they are in neither right now.  What am I doing to hide them, and how do I get them back?
 
Thanks

The Console View Strips Menu has an option to display the Mains.

You can also select the divider with the mouse and slide it over to reveal the Mains or the Buss pane or both. 

Thanks!  That did it.