An Arch SectionPlane is infinite, but its appearance is controlled by its Display Height and Display Length properties. Some users think this is a viewport, so the plane should only see what is "inside" the area indicated by the plane and should clip (don't show) everything outside. This is especially desired when projecting the plane's contents in TechDraw with TechDraw NewArch.
This is the behavior of a camera view, such as that found in Blender.
This effect is possible by selecting an object with TechDraw NewView, and then with TechDraw Clip. However, the Arch SectionPlane, and then the TechDraw NewArch, don't allow for clipping.
See this thread for the user requesting a clipping Arch SectionPlane: ARCH Section and Techdraw ArchView not clipping.
Allowing the Arch SectionPlane to behave like a camera would also be helpful for this: [Improvement] Perspective view in Arch SectionPlane.
Finally, the "Cut Distance" view property of a Section currently appears in the Property View but it seems it doesn't do anything. It's confusing to even show this property, so it should be removed.
https://github.com/FreeCAD/FreeCAD/blob ... ne.py#L576