> For the complete documentation index, see [llms.txt](https://windows.help.formit.autodesk.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://windows.help.formit.autodesk.com/tool-library/spline-tool.md).

# Spline

The Spline tool allows you to create organic sketches in space or on other objects.

![](https://193854745-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVWdttpiARClwDWoDArlA%2Fuploads%2Fgit-blob-e04b04810e002612caa50d60fe0ef490c51639f5%2Fspline.png?alt=media)

A spline is drawn from at least 3 interpolated points. The connected geometry is simplified creating a smooth and organic curve between the specified points. Like other drawing tools, splines can be drawn in 3D by snapping to 3D points while drawing.

To specify a distance, start typing a dimension value, and hit OK or press Enter in the Edit Dimension dialog.

Splines can also close on themselves creating a face.

![](https://193854745-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVWdttpiARClwDWoDArlA%2Fuploads%2Fgit-blob-5551fec94fdef27bbeea7b157654c709fd8509ae%2Fspline2.png?alt=media)

![](https://193854745-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVWdttpiARClwDWoDArlA%2Fuploads%2Fgit-blob-264d74557b5aff9e19e36ef70a707ef98bdaa536%2Fspline3.png?alt=media)

## Editing a Spline

You can also modify the points of a spline you have already placed by right-clicking it and choosing Edit Splice at the bottom:

<figure><img src="https://193854745-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVWdttpiARClwDWoDArlA%2Fuploads%2F8RWYTy76LdjgTbUq4zss%2Fimage.png?alt=media&amp;token=cdc56c74-6d3a-4f9f-a7da-58d86f27e07b" alt=""><figcaption></figcaption></figure>

The Edit Splice grips will appear, allowing you to move them.  The new spline will appear as an outline while editing.

<figure><img src="https://193854745-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FVWdttpiARClwDWoDArlA%2Fuploads%2FpCnw0v8DrrImHkuDnQDi%2Fimage.png?alt=media&amp;token=f8ec56bd-6c7c-4f5f-a8aa-41a51a7cdd66" alt=""><figcaption></figcaption></figure>

To complete the edit, exit the tool by clicking off into space or hitting ESC.  The new spline will replace the current spline.