> For the complete documentation index, see [llms.txt](https://docs.betterbuilding.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.betterbuilding.io/user-guide/2d-building/drawing/3d-view.md).
# 3D View
3D Views in the Building Assessment App provide a DXF preview of your model’s geometry, offering a detailed look at how your zones and surfaces are structured.
## View DXF
To view a DXF, head to the ‘3D View’ option in the results panel on the right. Click ‘Show in Large Viewer’ to open an interactive view where you can zoom in, examine surfaces, and toggle layers on or off. This makes it easier to check modelling assumptions and confirm accuracy.
## Compare the DXF preview
To compare DXF previews of reference and proposed models, go to ‘Compare Geometry’ under the Simulation settings. This lets you visually review changes between design iterations, helping to spot issues or validate improvements.
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