# Knots

Knots are connected control points that make up splines. Knots connect to each other with segments. A knot can have a tangent that controls the curvature of the segments that knot connects to.

Use knots to change the shape of a spline. For more information, refer to [Manipulate splines](manipulate-splines.md).
 
| **Topic**             | **Description**         |
| :-------------------- | :----------------------- |
| [**Link and unlink knots**](link-unlink-knots.md) | Set knots to the same position and link them. When a linked knot moves, all the knots it links to also move.|
| [**Split knots**](split-knots.md)| Divide a knot with two segments into two knots.|