I still am having problems getting over lays on my unit. From screed selected,menu,view options,data overlays, enter I get from menu, Overlay on/off, Edit custom,sonar,custom,Navigation,over #1,2,3,4 and 5 View overlay has only custom as an option. and when you chose one of the above the overlay turns on, but no overlay is on the screen. I have the unit setting on a table at my computer to try to get it setup. having NO LUCK! The manual does not give you a very good example on how to do this with the Non Touch Onix I have. Also I tried to have hummingbird tell me how to do it and they quoted the manual.
hpwells