Re: Click and Pawl
As Dennis mentioned "Press your palm against the spool rim to slow a running fish".
If I may add to what Dennis said.....start with light pressure from your palm just below the reel, over time you'll get a feeling as to where your drag should be set and just how much pressure you need to apply. Heavy tippet = more drag, light tippet = less drag.
And one more thing....watch your knuckles and avoid contact with the reel handle when you have a hot fish running, along with bruised knuckles, it can cost you the fish.
*Comments posted above are only my opinion. I may be right....eh, I'm probably wrong. Take 'em for what they're worth.*