I am having a slight issue with my gen 2 8inch. It’s not showing speed or my track on the water or my position on gps. I Think I have to mess with some settings or something is turned off.i have never had a graph like this model so it’s all a little new to me. Any help is much appreciated.
Matt
Your issues sound like all GPS related
Maybe start with your owners manual and GPS troubleshooting info
I would just Edit Overlay when in full screen sonar mode just to check settings and see if they look right. Though I thought if it worked in one page, it would also work in the other page.
John S.
I believe that each screen needs its own set up,I’m sure of that! go to data overlay for each screen and set it up then you should be good to go.example split gps and sonar is a set up gps and ss is a new page set up
Stan 
OK i’ll give that a try
Makes sense
Other then redoing your data overlays, one thing I have seen is in the advanced settings is you need to reselect THIS DEVICE for sonar.
each screen needs its own setup. I bet your full screen isn’t setup. edit overlay.
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