Merge pull request #233311 from noakup/master

adding prefer header options for timeout and datasources

Author: prmerger-automator[bot]

articles/azure-monitor/logs/api/prefer-options.md

@@ -8,11 +8,11 @@ ms.topic: article
 ---
 # Prefer options
 
-The API supports setting some request options using the `Prefer` header. This section describes how to set each preference and their values.
+The API supports setting some request and response options using the `Prefer` header. This section describes how to set each preference and their values.
 
 ## Visualization information
 
-In the query language, you can specify different render options. By default, the API does not return information about the type of visualization. To include a specific visualization, include this header:
+In the query language, you can specify different render options. By default, the API doesn't return information about the type of visualization. To include a specific visualization, include this header:
 
 ```
     Prefer: include-render=true
@@ -63,3 +63,13 @@ To get information about query statistics, include this header:
 ```
 
 The header includes a `statistics` property in the response that describes various performance statistics such as query execution time and resource usage.
+
+## Query timeout
+The default query timeout is 3 minutes. To adjust the query timeout set the `wait` property, as documented [here](timeouts.md). 
+
+## Query data sources
+To get information about the query data sources - regions, workspaces, clusters and tables, include this header:
+
+```
+    Prefer: include-dataSources=true
+```