> ## Sectioning

> With Sectioning feature, you can view the cross-section and cut-through of 3D models. In the Define Section dialog box, you can define the section plane position, section plane orientation, and the cut-through.

> ## Section Plane Options

> In the Define Section dialog box, you can use the following options to define the orientation of the section plane:

> Option | Description
> --- | ---
> XY Plane | Section plane is oriented along the XY plane.
> YZ Plane | Section plane is oriented along the YZ plane.
> XZ Plane | Section plane is oriented along the XZ plane.
> From 3 Vertices | Select three vertices on the object to define the orientation of the section plane.
> From Face Normal | Select a face on the object to define the orientation of the section plane perpendicular to the face.
> From Edge Tangent | Select an edge on the object to define the orientation of the section plane perpendicular to the edge’s tangent.
> Define a Plane | Define X, Y and Z coordinates to orient the section plane.

> ## Cut Options

> In the Define Section dialog box, you can use the following cut options to define the cut-through of an object:

> Option | Description
> --- | ---
> Don’t Cut | Display the object without a cut.
> Cut | Object displayed is cut along the section plane.
> Invert | Reverse the selection, display the other part of the object.
> Show Both | Restore the cut part of the object.
> Edges Only | Display only the edges of the object along the section plane.

> ## Defining the Section Plane and Cut-through

> 1. From the Manipulate menu, select Section, and then select Define.

> The Define Section dialog box appears.

> Note: From the AutoVue toolbar, you can also click Sectioning .

> 2. From the Section Plane list, select the orientation for the section plane.

> See Section Plane Options

> 3. From the Cut Options list, select the cut option that you want.

> See Cut Options

> 4. To define the plane position, click and drag the Plane Position slider to the position you want.

> Select Dynamic, if you want the plane to move simultaneously with the slider.

> 5. Select Show Plane, if you want the section plane visible.
> 6. Select Fill, if you want the section plane filled.

> The section plane is displayed as filled and the Section Area is calculated.

> Note: The fill color can also be set from the Configuration dialog box.

> See Configuring AutoVue

> 7. From the Measured Units list, select the unit in which you want to measure the section surface.
> 8. Click Close to close the Define Section dialog box.

> Note: Once you have defined the section plane and closed the Define Section dialog box, among other options, you can choose whether to enable, remove, or invert a defined section from the Section menu.

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