Craftsman 16in bar Chainsaw - Angle to sharpen the teeth on the chain?

2.4 cubic inch displacement. Chain is starting to cut slower, and I have an electric chain sharpener, I just don't remember the angle. I cut mostly soft wood, Pine. But on occasion I cut the good hard stuff mostly oak. I know that cutting both types of wood affects the angle of the cut. You don't want overly sharp teeth for hard wood. Thanks