> 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/plantprojectmanager/usage/pid-3d-drawing-node/update-bolt-calculation.md).

# Update Bolt Calculation

"Update Bolt Calculation" is updating the bolts used by PlantExpressTools' [Bolt Calculation](/plant-tools/plantexpresstools/how-to-use/bolt-calculation.md). you can also select multiple drawings.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-0fdf97fc7952f1ed375a2577d2510f919f8bac2b%2FPPM-252.png?alt=media)

The selection dialog opens where all Pipe Line Groups of all selected drawings are shown.

For details see [Bolt Calculation](/plant-tools/plantexpresstools/how-to-use/bolt-calculation.md).

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-347d5fa3d3152369373d02c3cc2d2262eec73fec%2FPPM-253.png?alt=media)