> For the complete documentation index, see [llms.txt](https://docs.flatredball.com/flatredball/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flatredball.com/flatredball/glue-reference/files/file-types/glue-reference-splinelist-splx.md).

# SplineList (.splx)

### Introduction

The .splx file format is an XML file that stores a list of Splines. For more information on using Splines in code, see the [Spline page](https://github.com/flatredball/FlatRedBallDocs/tree/main/frb/docs/index.php).

### Adding a SplineList file to Glue

To add a new SplineList file:

1. Create a Screen or Entity which will contain the SplineList file
2. Right-click on the Files item
3. Select "Add File"->"New file"
4. Select "Spline List (.splx)" as the file type
5. Click OK


---

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