> 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.

![](/files/-MlG7uw9JEgHHPPvJNo4)

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.

![](/files/-MlG7uwBm4Q-zKH1MZhY)

![](/files/-MlG7uwCggqkMcD3GHWX)

## 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="/files/dCoG0wd2QiJPuie2dJPj" 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="/files/o8nwPCjni8XGv9xvOjLA" 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.