Congratulations on setting up and installing your 798SI. I have had one for about three months and love it. I learn more each day I use it. I have sit in my boat for hours using the demo mode and played with the adjustments until I feel comfortable. NBkirsch is right, there are many threads on this forum that will help you with your settings. One of the biggest mistakes I was making was not slowing the graph speed down. Since I now normally run it around 2 to 3 I have noticed much better presentations. Do as NBKirsch recomends and your will find some wonderful recomendations. Welcome to the experience of SI.
Ron