Also choosing a shorter SI Range setting will allow the fish echoes to be larger on the display...

I rarely use a SI Range larger than 70' left and right...(unless I'm in new water looking for structure I don't already have marked)...

And that's on my 1197's 10.4" screen...

In a smaller display like the 598...I would rarely scan farther than 30-40' when looking specifically for fish echoes...

Rickie