> For the complete documentation index, see [llms.txt](https://windows.help.formit.autodesk.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://windows.help.formit.autodesk.com/tool-library/section-planes.md).

# Section Planes

Use **Section Planes** to cut into your FormIt model, revealing interior spaces and structural elements.

Learn about Section Planes in the [FormIt Primer](/formit-primer/part-i/section_planes.md).