Launch the **Cross Section** window from the sidebar and activate the **Plane **checkbox**. **

We offer several ways to define a cross-section plane:

1) You can define the plane parametrically:

- Origin X, Y, and Z are the coordinates of a point on the plane (plane origin).
- The first angle is the angle between the plane and the ground plane.
- The second one is the angle of the plane around the z-axis.

2) Define the plane interactively with the **Set plane:**

lets you define a horizontal plane based on a chosen location on the viewport. To fine-tune the height of a horizontal plane, adjust the**Horizontal****Origin Z**value.- Use
**Vertical**to generate a vertical plane based on two user-defined points. You can then fine-tune the rotation angle . - Use
**Free**to produce a plane based on three user-defined points. **Parallel**lets you move the current plane parallel in either direction.

3) Use **Copy from plane** to restore plane parameters from a previously created plane.

4) Use **Copy from section** to restore plane parameters from a previously created section.

Press **Create,** and the plane will be added to the Object List as an individual plane object.

Starting with NUBIGON v6.0.0, a cross-section plane only cuts the scene after it has been created.

`An already created plane can be further transformed using manipulators.`