First, normal is enabled by default but any other pitch curve you have to goto the corresponding throttle curve menu to enable it.

Then you cursor down to the numbers and adjust them with the jog wheel.

Best practice is to do a 3d setup on your helicopter with plus and minus 9, 10, or 11 degrees, set by using a pitch gauge and depending on your engine Lets say +-10, ideally then you would have -10 degrees = 0 percent -5 at 25 percent, 0 at 50, 5 at 75 and 10 at 100

In reality its best to have +- 11 or 12 by end points, and setting the rest of the points by the pitch curve numbers, then use all you can get up top for your throttle hold curve.

Check out http://www.raptortechnique.com he's got programming for the Raptor and the 9C, unless you have a CCPM heli they work the same way for the most part.