Hair Curve - Edit mode - Segments menu

Edit Mode - Segments Menu

The Segments menu exists for Curve and Surface object types. They are both curve types, but of different kind.

The added objects in edit mode becomes part of the current object geometry.

Subdivide

Subdivides the selected curve geometry, and adds more control points.

Last Operator Subdivide

Number of Cuts

Number of subdivision cuts.

Switch Direction

Just for Bezier Curve object type. Surface Nurbs curves doesn't have a direction. Switches the direction in which the curve is pointing.