# Gantt: Dynamic analytics

You can also use DAX measures to plot reference bands. A DAX-driven reference band is used to overlay contextual time ranges on top of a Gantt chart without modifying the underlying tasks. This enables dynamic and user-driven insights that cannot be achieved with static data alone.

We'll look at how to set up dynamic analytics in Analytics+

{% stepper %}
{% step %}
Create a **DAX measure** to hold reference dates and text. Assign it to the Gantt visual parameter.

<figure><img src="/files/TgdRrvlkjOMtTrW0uamA" alt=""><figcaption><p>DAX measure added to the Gantt chart</p></figcaption></figure>
{% endstep %}

{% step %}
Assign the DAX measure to the **Dynamic analytics** data well in the Pivot data window. You'll notice that reference bands and text, based on your DAX measure, are automatically plotted.

<figure><img src="/files/UaUawVVXSvYuvgyXLuXa" alt=""><figcaption><p>Reference bands and text plotted based on the DAX measure</p></figcaption></figure>

{% endstep %}

{% step %}
The **Dynamic Analytics button** will now be enabled in the Story section of the Gantt ribbon. Click the button to open the customization side pane.

{% hint style="info" %}
The Dynamic Analytics button will be enabled only after assigning a DAX measure to the Dynamic analytics data well in the Pivot Data window.
{% endhint %}

<figure><img src="/files/JUiqApiw7FAlA1UIMQtd" alt=""><figcaption><p>Dynamic analytics customization window</p></figcaption></figure>
{% endstep %}

{% step %}
Customize the background fill and format the text from the side pane. The customization options are covered in the [Analytics section](/analytics+/gantt-chart/gantt-analytics.md).

<figure><img src="/files/tPEstAWBUVuOACwaLi47" alt=""><figcaption><p>Dynamic analytics customization</p></figcaption></figure>
{% endstep %}
{% endstepper %}


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