Until you get used to adjusting control points to manage curves, you’ll appreciate a feature that Illustrator provides to smooth out a jagged path. Choose Object >, Path >, Simplify to open the Simplify dialog box and clean up selected curves. The Simplify dialog box has a number of useful options: You can also add anchor points automatically between all anchor point in a selected path. Select the path, and then choose Object >, Path >, Add Anchor Points. This option instantly doubles the number of anchor points, providing more flexibility in manipulating the path. As I explained earlier, the Convert Anchor Point tool can be used to convert sharp-angled anchors to smooth anchors. It also can work the other way. If you want to convert a smooth anchor back to a regularly angled point, click the anchor with the Convert Anchor Point tool again. To create hybrid anchors, in which one control point is smooth and the other is angled, select a control point with the Direct Selection tool and drag it back into the anchor. I’ll show other tricks for this tool in the next section. Source.