It is used to create a 3D surface or solid by sweeping an object around its axis.

 It is used to create a 3D solid or surface by specifying a series of cross-sections.

It is used to create a parallel curves, parallel lines, and concentric circles.

The file extension for AutoCAD drawing files.

Loft creates a 3D solid from an object that encloses an area.

Revolve creates a 3D solid surface by sweeping a 2D or 3D curve.

You can use the loft command if the shapes are overlapping to each other.

In extruding a 2D shape into 3D you have to select first the shape before the extrude command.

You can offset an object at a specified distance or through a point.