I'm not familiar with the options on your unit, but with an LCD you want the scroll speed to be on it's fastest setting. You want the newest sonar returns to show up on the screen, thus the fast scroll speed of the screen. When a fish comes in, it be a solid line (if it's off the bottom). Your lure should also be a thin solid or slighty broken line. Watch the bottom closely, any little bump is usually a fish. When a fish appears, often it looks like it rises off the bottom. It can either rise up off the bottom, or some in from the side, and you can't tell the difference between the two. Hope this helps.
Eric
Eric
