> 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.

![](/files/Qh5L1n2ooyPuUvY9b3Uh)

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

![](/files/HDnlumGDeIizCBVKsE9z)

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.

![](/files/N8FFxO7xCmkyfVxNjSAL)

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

![](/files/mlmnL7c1TERj1Ypmn0qo)

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

![](/files/aL6gdCSABx8vzeDrpZtx)