Long casting (I-L); Achieving the longest casting distance with relatively heavy rigs in calm wind condition.
Middle distance (I-M); Have a little stronger brake than A mode, and you may cast with full strength. Used to cast long with nylon lines.
All round (I-A); Allows rigs to be cast without stress. Brake force at the end is reduced to add a few yards. Please set at A mode when you use with fluorocarbon lines.
Windy casting (I-W); Allow the best casting in winds from ahead. Great for bulky, light baits as well.