Viewing squid on the fish finder

This weekend, I was right next to a pb while jigging up squid in Monterey.  He was marking it on his sonar, depth, relative concentration, etc. and on my sonar (lowrance hook5-2 with tripleshot) didnt pick anything up at all - barely saw the bottom at 120' deep.  It was pretty obvious that I was either not using the right settings even though I changed the settings the whole time trying to see them, or the transducer/ff is not working correctly.  Interestingly, one of the settings was "overlay downscan" which was checked, and when I unchecked it, I no longer had signal.  A restoring of factory defaults and a restart got the sonar only signal back, but still, no squid marks.  Increasing the sensitivity just increased noise. 

My questions: what does squid look like on sonar, and is there a specific type of setting that allows seeing them better than other settings?  I usually see big bait balls just fine, but wondering if I am missing smaller ones too.     

They look like vertical dash lines on my Striker4 fish finder.   I can take a picture when I go squid hunting next time.

Squid show up as different marks at different times on different fishfinders, sure sign is a cormorant or sea lion surfacing with a squid in their mouth also look for Rizzo’s 
Sometimes they don’t show up at all, don’t be afraid to drop blindly
Typical squid marks include loose scattered “fuzz” on the bottom, gentle curving streaks upwards in light blue (light grey for non-color units), and if they’re abundant they ball up but not like a dark thick cloud of fin bait more like a thin broad fog in the top 2/3’s of the water column

I m planning to catch some squids tomorrow.   Will post picture of squids marks on the ff.