Basic Usage of Bezier Handles

1. Create a path by manually drawing in the viewport or by converting from transform keys.
   
2. Select the path and start the path-editing mode (by launching the Path Properties panel).
3. Choose one of the anchor points you wish to modify, and the Bezier handles associated with that point will become visible.
   
4. Drag to transform the anchor point to curve the line segment.
   
5. Repeat the same steps to edit the line segments of the entire path.
   
6. Press the ESC key to leave the edit mode.