How to > Analyze > Cross-section
  
Cross-section
Cross sectioning lets you view a cross section of your model. To see a cross section
1. Click 3D Access and then, in the Window group, click the arrow next to Toolbars.
2. Click Modeling > Commands to activate the Modeling Commands toolbar.
3. Click Define Cross Section on the Modeling Commands tool bar.
4. Click on the model any face that is parallel to the cross section you want to obtain. The Use the 3D CoPilot appears (pictured below).
5. If needed, click on one of the spheres surrounding the Copilot and drag to orient the arrow normal to the plane you want to create.
6. Click the 3D Copilot and release.
7. Drag your mouse along the direction of the arrows to see a moving cross section. When you see the cross section you want, stop.
8. Click to designate the location of the clipping plane.
The 3D Copilot
You can zoom, pan, and rotate the model as usual to inspect the cross section.
Measure cross section dimensions
If you have followed the instructions above, now you can use Enable Exact Cross Section (which is otherwise grayed out) on the Modeling Commands tool bar. This provides an analysis profile in white. You can measure the dimensions of your cross section accurately.
Learn more
See Measure