> ## Documentation Index
> Fetch the complete documentation index at: https://docs.meridian.surf/llms.txt
> Use this file to discover all available pages before exploring further.

# Set a Variable

> Update a Storage or temporary variable for later use in the flow.

Set a Variable updates Storage or temporary variables mid-flow.

## What it does

Opens the variable editor in the sidebar where you pick an existing variable and assign a new value. Values are readable later as `{vars.name}`.

## Configuration

Select a variable from Storage or temporary variables, then set its new value in the sidebar editor.

For creating brand-new Storage variables with scope rules, use **Create a Variable** instead.

## See also

* [Variables & Data storage](/builder/action-blocks/variables-and-data-storage) — Browse all blocks in the Variables & Data storage category.