> 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/iso-line-number-node/lock-line-and-issue.md).

# Lock Line and Issue

With the Plant 3D "Lock Line and Issue" you can lock a lin in 3D and prevent users from changing the line.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-cf9693af975b552d6ee792938dab15ceffb7a974%2FPPM-258.png?alt=media)

Locked lines will be shown with a lock symbol.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-efbaa7495b071b7202681f5524eae84ada716f28%2FPPM-259.png?alt=media)

In 3D you see a lock symbol also when you are near an object of the locked line. You also see the info "- Line Number is locked -" in the tooltip of any object of the locked line.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-1d52031a8a43f51614372530f8bba233312b9a9e%2FPPM-260.png?alt=media)

Locked lines can also be unlocked again.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-c9a750d3394664b8830f9db12641fa653291db95%2FPPM-261.png?alt=media)

Now the symbol in the tree and in 3D is gone.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-9f500eb1931889a2bf7de360af03c9dd6e6a0ebe%2FPPM-262.png?alt=media)