> 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/plantspecdriven/how-to-use/use-cases/linking-pid-symbols-3d-object-pid3d/linking-pid-line-group-3d.md).

# Linking P\&ID Line Group (3D)

This chapter describes how you can link a P\&ID Pipe Line Group with the 3D Line Group.

If you use the context menu on a P\&ID Pipe Line Group node to link the Line Group to the 3D Line Group you will recognize, that there is no function to link them.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-96682acaffbb42d82e971c87c9b493a9bdca3dd0%2FUse-Cases-0337.png?alt=media)

In order to link Line Groups you need to link the P\&ID Line Segment. Here you have **Link with 3D Object**.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-916be2926ba28be3d56a875d3d4694991c8744ba%2FUse-Cases-0331.png?alt=media)

As mentioned before, there are no Line Segments in 3D. PlantSpecDriven uses the pipes and elbows and links them to the P\&ID Line Segment.

You have to select at last one pipe or elbow.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-ba2262fc56109559ce1f4bc627e980e4857bcc6a%2FUse-Cases-0332.png?alt=media)

Or you just select multiple objects. PlantSpecDriven will filter out everything which isn't a pipe or elbow.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-501cf2bbefc4e98bd1d26353b0645e5059c4bd4f%2FUse-Cases-0333.png?alt=media)

Now you see, that not only the P\&ID Pipe Line Segment is linked, but also the P\&ID Pipe Line Group.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-f359e04c6a7d5fb2fdb5618d7f29c363491bd166%2FUse-Cases-0334.png?alt=media)