Set the drag at 20-25% of the b/s of the line, so with 6lb line set the drag to 1.25-1.5lb. To set precisely, put the weight required in a carrier bag, and water in plastic bags is perfect, as you know that 1pt weighs 1.25lb, 1 litre weighs 2.2lb, you can take it from there. Thread the line through the guides, screw the drag tight, tie the bag to the line and lift from the ground. Once suspended, reduce the drag until it starts to yield line, then tighten slowly until it JUST clicks once. You can then be entirely confident that it is impossible to be broken by a fish. You will need to pump and wind when playing fish, to ensure you don't wind against the drag, and to exert pressure to net the fish, simply put your second finger against the spool lightly. That will almost double the pressure.
i only set the clutch on my carp and barbel
reels all the others i backwind only