> For the complete documentation index, see [llms.txt](https://docs.chartsql.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.chartsql.com/reference/directives/subtitle.md).

# @subtitle

## Quick Reference

```sql
-- @subtitle: Sales over time grouped by month
```

## Valid Types

`String`

A short sentence string that describes the chart.

## Full Example

```sql
-- @title: Auto Heatmap
-- @subtitle: An example auto generated heatmap comparing two categories
SELECT
Owner,
Channel,
count(*) as Sales
FROM Sales
WHERE Sales.Status = 'Won'
GROUP BY Owner, Channel
```

## Use Cases

Use a subtitle when the title is insufficient to convery the purpose of the chart, and you want to add a short description. Subtitles are used in various places in the ChartSQL UI

<div align="left"><figure><img src="/files/vFvwS6wdDyDgm0ho0guR" alt=""><figcaption><p>Example of a subtitle in the file list</p></figcaption></figure></div>


---

# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.chartsql.com/reference/directives/subtitle.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.