First class day with the new HDS 7 gen2 - need advice

[STUMP HUNTER]

I know I will spend many hours learning how to use this unit. I spent 5 hours on the lake today getting to know the unit, I think I learned a little but a ton more to learn.

I need advice on how to adjust the unit so some of the red will disappear. I don't understand the SI at all not even sure how to hold my head when looking at screen to know what side is what or what is the water column or what is the bottom...?

Any way, was able to get screen-shots saved and transferred to a SD card