Hi, enjoying my GP1871F but am having trouble selecting specific data sources for display on the Multi-Instrument display screen. Currently, all I have to select from are SOW and SOG, and those work ok. But I can't see any others in the edit display, even though they do show up on the Settings/Interface/Data Sources list. Is there another step or path I need to follow to be able to see those additional data sources on the selectable list for Instrument Display? Thanks.