> For the complete documentation index, see [llms.txt](https://help.auxalia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.auxalia.com/plant-tools/plantexpresstools/how-to-use/clash-detection.md).

# Clash Detection

Clash Detection (formerly PlantClashDetection) find clashes within your Plant 3D drawing.

Clashes will be found between Plant 3D objects, Solids, blocks with solids, and XREFs with those types of objects.

Table of Content:

* [How to use Videos](/plant-tools/plantexpresstools/how-to-use/update-tags/how-to-use-videos.md)
* [User Interface](/plant-tools/plantexpresstools/how-to-use/update-selection-lists/user-interface.md)
* [Select Objects](/plant-tools/plantexpresstools/how-to-use/clash-detection/select-objects.md)
* [Find Clashes](/plant-tools/plantexpresstools/how-to-use/clash-detection/find-clashes.md)
* [Ignore Clahes](/plant-tools/plantexpresstools/how-to-use/clash-detection/ignore-clahes.md)