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modeling-app/docs/kcl/settings.md
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---
title: "KCL Settings"
excerpt: "Documentation of settings for the KCL language and Zoo Design Studio."
layout: manual
---
# KCL Settings
There are three levels of settings available in the KittyCAD Design Studiolication:
1. [User Settings](/docs/kcl/settings/user): Global settings that apply to all projects, stored in `user.toml`
2. [Project Settings](/docs/kcl/settings/project): Settings specific to a project, stored in `project.toml`
3. Per-file Settings: Settings that apply to a single KCL file, specified using the `@settings` attribute
## Configuration Files
The KittyCAD Design Studio uses TOML files for configuration:
* **User Settings**: `user.toml` - See [complete documentation](/docs/kcl/settings/user)
* **Project Settings**: `project.toml` - See [complete documentation](/docs/kcl/settings/project)
## Per-file settings
Settings which affect a single file are configured using the settings attribute.
This must be at the top of the KCL file (comments before the attribute are permitted).
For example:
```js
// The settings attribute.
@settings(defaultLengthUnit = in)
// The rest of your KCL code goes below...
x = 42 // Represents 42 inches.
```
The settings attribute may contain multiple properties separated by commas.
Valid properties are:
- `defaultLengthUnit`: the default length unit to use for numbers declared in this file.
- Accepted values: `mm`, `cm`, `m`, `in` (inches), `ft` (feet), `yd` (yards).
- `defaultAngleUnit`: the default angle unit to use for numbers declared in this file.
- Accepted values: `deg` (degrees), `rad` (radians).
These settings override any project-wide settings (configured in project.toml or via the UI).