# Flex direction

Sets whether flex items run in a row or a column.

## What does `flex-direction` do?

`flex-direction` sets whether flex items line up in a row or a column, and which way.

```css
.sidebar-menu { display: flex; flex-direction: column; }
```

Level: Journeyman · [More CSS terms at this level](https://www.ask-codey.com/glossary/subjects/css/journeyman)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/flex-direction