Nodes, Tangent Points, or Anchor Points

Smooth/Tangent - A tangent node is a variation of a smooth node that has a straight line segment on one side of the node and a curved line segment on the other side, but there is not a sharp point at the intersection. The control handles form a straight line which corresponds with the direction of the straight line segment it is attached to. The opposing control handle is used to manipulate the shape of the attached curve segment.

Graphics Software Glossary