# Reference Lines and Reference Range

The xViz Gantt Chart provides you with the option to display **Reference Lines** (based on dates) and **Reference Ranges** on the chart thereby giving an indication of where you are in the project and to assess the level of completeness.

<figure><img src="/files/71PHe9nxKuKxJydBYteY" alt=""><figcaption><p><em>Image 1: Reference Lines &#x26; Reference Ranges</em></p></figcaption></figure>

In this document:

{% stepper %}
{% step %}
[Introduction to Reference Lines and Reference Ranges](/project-management/reference-lines-and-reference-range/introduction.md)
{% endstep %}

{% step %}
[Setting up using configurations](/project-management/reference-lines-and-reference-range/static-approach.md)
{% endstep %}

{% step %}
[Setting up using data-fields](/project-management/reference-lines-and-reference-range/data-driven-approach.md)
{% endstep %}
{% endstepper %}

***

Try the [xViz Gantt Chart](https://xviz.com/visuals/gantt-chart/) (Microsoft certified) for Power BI from Microsoft AppSource [here.](https://appsource.microsoft.com/en-sg/product/power-bi-visuals/WA200000891?tab=Overview)


---

# Agent Instructions: 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.xviz.com/project-management/reference-lines-and-reference-range.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.