lowrance lms 337

I was scrolling around in my menu on the maps section and now nothing will come up but the sonar screen, what did I do, and how do I get the maps back on? I do not have a book, what is the sequence to reset back to factory default?

Go to menu and hit twice...go to "show gps settings"...enable...you accidentally hit hide I think...if that don't work uh oh...