> For the complete documentation index, see [llms.txt](https://docs.blynk.io/en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blynk.io/en/~/revisions/VogQMoqSfAjFiPWKwr6n/blynk.console/devices/device-profile/service.md).

# Service

This tab represents selected datastreams chart.

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

![](/files/-MUmwvs-gONB9SfZW3wp)

## 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


---

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