Man that looks awesome.
I'm going to have to learn to use mine. How do you know when you're seeing what's directly below you since the screen scrolls?
The right edge of the screen shows what is coming into the cone put out from the transducer. Think of where your transducer is mounted. Figure out which frequency you are using to help you figure out how large the cone is based on the depth of the water you're in. As the objects are passing under you they are moving to the left on your screen.
Go out and play with your screen when you don't need to be fishing. Find known objects under water and approach them to see how they look on your screen. Take a few medium rocks out and drop them so you can see what moving items look like on the screen.