Type Tool
Defines the connection type between curve points
Curve Mesh Type
Defines the connection type between curve points:

Line
Connects points with straight lines.

Catmull-Rom
Automatically generates smooth curves without control points.

Bezier
Uses handles (Control Points) to adjust the curve shape.

BSpline
Forms a curve based on given points without necessarily passing through them.

Closed
Connects the start and end points of the curve to form a closed loop.

