Add data history widget

Author: baanders

articles/digital-twins/how-to-use-3d-scenes-studio.md

@@ -283,6 +283,14 @@ Here are the types of widget that you can create:
 
     :::image type="content" source="media/how-to-use-3d-scenes-studio/new-behavior-widgets-value-expression.png" alt-text="Screenshots showing the notification text being entered on the value widget dialog, and how the widget appears in the Viewer." lightbox="media/how-to-use-3d-scenes-studio/new-behavior-widgets-value-expression.png":::
 
+* **Data history**: For displaying property values over time. This widget works with Azure Digital Twins' [data history feature](concepts-data-history.md), so it's only available if you've [enabled data history](how-to-use-data-history.md) for the instance being used in this 3D scene. Once a data history connection exists for the instance, you'll be able to display that data with this widget.
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+    The widget will fill the **Connection string** field automatically, by targeting data in the Azure Data Explorer instance that's already connected to this Azure Digital Twins instance.
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+    Enter a **Display name**, and add one or more **time series** datasets based on properties of the primary twin. You can also customize how the time series data appears in the widget chart.
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+    :::image type="content" source="media/how-to-use-3d-scenes-studio/new-behavior-widgets-data-history.png" alt-text="Screenshot of creating a new data history widget in 3D Scenes Studio." lightbox="media/how-to-use-3d-scenes-studio/new-behavior-widgets-data-history.png":::
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 ### Use custom (advanced) expressions
 
 While defining [visual rules](#visual-rules) and [widgets](#widgets) in your behaviors, you may want to use custom expressions to define a property condition.