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

# Environment Variables

Environment variables can be set at two levels.  The `Environment` or the `Stack`.

## Environment Level Environment Variables

When setting environment variables at this level.  Any stack created in this environment will consume these environment variables.  This is useful if you have some common variables that will be the same across stacks in the environment.

To add variables at the environment level:

1. Go to the environment view.
2. Click the `Environment variables` tab.
3. Make changes.
4. Click `Save Changes`
5. This will kickoff a deployment and your changes will go live shortly.

## Stack Level Environment Variables

<Info>
  **Note:** You can override variables at the Environment level within a Stack.
</Info>

When setting environment variables at this level.  These variables will only be available to individual stack and not the rest of the stacks in the environment.

To add variables at the stack level:

1. Go to the stack view.
2. Click the `Environment variables` tab.
3. Make changes.
4. Click `Save Changes`
5. This will kickoff a deployment and your changes will go live shortly.