I'm surprised that with your lack of knowledge of fish finders, you went out and bought the 'top-of-the-line' Lowrance units to learn on. I'm also surprised the retailer didn't instruct you on the operation of it when you purchased it. To help you, I would suggest going to www.Lowrance.com , click on support, and view thier videos that relate to 'Touch' units. This will help you alot. <*)}}}><