I have two depthfinders on my boat a x135 and a lms 520c. I have tried alot of sensitivity settings to clarify the picture and accuracy without a lot of artifact on the screen. Do any of u adjust your depth finders from the factory setting? if you do what do u change?

So far I have left mine at factory settings.

Yes.  In the instruction manual mine told me how to set it and what to look for on the screen while setting it.  If you have an instruction manual it should tell you.  Factory settigns are rarely the best.

Ok thanks. The dealership didnt give me a manual but i downloaded it off the lowerance website.