> For the complete documentation index, see [llms.txt](https://help.pickzen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.pickzen.com/guides/nocode/functions/flat.md).

# FLAT

### Syntax

**FLAT(lists, \[keys])**

| Argument name                                | Description                                             |
| -------------------------------------------- | ------------------------------------------------------- |
| <p><strong>lists</strong></p><p>Required</p> | Dictionary of lists.                                    |
| <p><strong>keys</strong></p><p>Optional</p>  | Lists to flat. By default, all lists will be flattened. |