what are the adjustments (turns) on the carb. homelite 240 10629?

I have a homelite 240... 10629... and I need to adjust the carb. can you help me? There is a (high) and (low) above and below each other next to the idle (screw). How many turns clockwise or counter do I turn them from fully closed??? On the left side it says "homelite 240". The exhaust is on the right. Spark plug on the right on the back, next to the handle. I have a 15" 1/2" bar from the chasis teeth next to the blade. please help, if you are able...