Section 4 · Vector Construction
Bezier Curves and Handles
- Definition
Curved path segments whose shape is controlled by direction handles extending from each anchor point. Handle length controls the depth of the curve; handle angle controls its direction.
- Why it matters
Handles are the difference between drawing a curve and specifying one. Fluency here is the single most transferable vector skill.
- Example
Shortening a handle to tighten a curve’s arc without moving the anchor point itself.

https://graphicdesign.stackexchange.com/questions/57057/how-to-move-one-bezier-anchor-point-while-keeping-the-direction-locked