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

# Custom Subject

> Personalize your email subject line with dynamic placeholders for better engagement.

You can define a custom subject format for all release notification emails.\
Use dynamic variables to automatically include relevant information in each message.

## Supported Variables

<ParamField query="{title}" type="string">
  The release title
</ParamField>

<ParamField query="{version}" type="string">
  The release version (if available)
</ParamField>

<ParamField query="{project}" type="string">
  The project name (if available)
</ParamField>

<ParamField query="{workspace}" type="string">
  Your workspace name
</ParamField>

## How to enable

<Steps>
  <Step title="Navigate to Settings page">
    Go to **Settings → Email** in your workspace.
  </Step>

  <Step title="Enter your subject format">
    Enter a subject template using any of the supported variables.\
    Example: `[{workspace}] {title} ({version})`
  </Step>

  <Step title="Save">
    Click **Save Changes** to apply your new subject format.
  </Step>
</Steps>

### How it works

Each time a release email is sent, Onset replaces the variables with actual values.\
For example:\
`[{workspace}] {title} ({version})` → `[Onset] API Improvements (v2.3.0)`