Part of a Bezier. This point is defined by a position and 2 interpolations types. To modify the type of interpolation, right-click the point and choose between:
or access it in the layer tree:
Tangents define the way edges curve:
Linear Tangents = No curves
Quadratic Tangents
Cubic Tangents
Parameters
Position of the control point
Path 2d Tangents: Interpolation of the control point