> For the complete documentation index, see [llms.txt](https://docs.paragontruss.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.paragontruss.com/design/explanation/component-insertion.md).
# Component Insertion
## Profile Line Tool
Use the Profile Line section to manually add lines by specifying their distance and slope then clicking the `Add Line`.
If you need to erase lines you can click the `Back Up` button until you have removed the desired number of lines.
Clicking the `Close Profile` button will attempt to add the rest of the lines needed to close your profile shape and the `Clear Profile` button will erase all of your lines and leave you with an empty scene.
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