# Service

This tab represents selected datastreams chart.

{% hint style="info" %}
To add datastream to the selection list allow it to [save RAW data](https://docs.blynk.io/en/~/revisions/VogQMoqSfAjFiPWKwr6n/blynk.console/templates/datastreams/datastreams-common-settings/save-raw-data) during Template datastreams setup.
{% endhint %}

![](https://1839001309-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MBFTVMf7L6S67HOuqVC%2F-MUmdAQ937t-7CohyFat%2F-MUmwvs-gONB9SfZW3wp%2FDevice_Service.gif?alt=media\&token=a176fa83-ae6e-41f8-93b4-1b8a2527dc5b)

## Datastreams selection panel

*Choose Datastreams* you want to view (**Clear selection** is supported by clicking this string).\
\&#xNAN;*Click on preview window* or **Close** button of the datastreams selection area to open the chart window.\
\&#xNAN;*Click* **chart datastreams** button on top left to return to datastreams selection.\
Also there's an option to view the chart full screen – click **Chart Expand** button at top right.

## Graphs window

**Datastreams legend** is on top left.\
Each Datastream will have it's own color after it's selected.

There are to axles:

* **Datastreams Values** – datastreams values based autoscale is supported
* **Time** – move the slider to get to desired time period