The Convert Point Tool edits existing vector shape masks and paths (shape outlines) by converting smooth anchor points to corner anchor points and vice versa.
In the Toolbox, select the Convert Point
Tool.
Click on a smooth anchor point to convert it to corner anchor point.
Drag away from a corner anchor point to convert it to smooth anchor point.
To convert a smooth point to a corner point with direction lines, drag direction pont (rotate
lever) to build angle (movie).