The manual didn't help me either. Did you get the DVD tutorial? That's where I got all my information.
if you send me a pm stating what you need to learn, I'll try and work you through it. I've had my 899 for 3 months now and been playing with it since I got it. Yesterday it paid off big time, allowed me to find some suspended fish 25-29 feet in 30-35 feet. But it took me most of the day to find them.
I split my screen so I can see the old fashion views, and compare them with the Si/Di views. I also made it a point to go look at structure that I know where and what it was, so I can again compare views. They the views, are entirely different. But once you know what you're looking at, it comes together. Anyway send me a pm.