Merge pull request #290906 from PatAltimore/patricka-create-dataflow-fixes

Add serialization screenshot for storage endpoint

Author: JamesJBarnett

articles/iot-operations/connect-to-cloud/howto-create-dataflow.md

@@ -846,6 +846,10 @@ To send data to a destination other than the local MQTT broker, create a dataflo
 
     :::image type="content" source="media/howto-create-dataflow/dataflow-destination.png" alt-text="Screenshot using operations experience to select Event Hubs destination endpoint.":::
 
+    Storage endpoints require a [schema for serialization](./concept-schema-registry.md). If you choose a Microsoft Fabric OneLake, Azure Data Lake Storage, Azure Data Explorer, or Local Storage destination endpoint, you must [specify a schema reference](#serialize-data-according-to-a-schema). For example, to serialize the data to a Microsoft Fabric endpoint in Delta format, you need to upload a schema to the schema registry and reference it in the dataflow destination endpoint configuration.
+
+    :::image type="content" source="media/howto-create-dataflow/serialization-schema.png" alt-text="Screenshot using operations experience to choose output schema and serialization format.":::
+
 1. Select **Proceed** to configure the destination.
 1. Enter the required settings for the destination, including the topic or table to send the data to. See [Configure data destination (topic, container, or table)](#configure-data-destination-topic-container-or-table) for more information.