added images for create function/function app

Author: JimacoMS3

articles/iot-dps/how-to-use-custom-allocation-policies.md

@@ -113,12 +113,18 @@ In this section, you create an Azure function that implements your custom alloca
     > [!NOTE]
     > By default, **Application Insights** is enabled. If you want to, you can disable it by selecting the **Monitoring** tab and selecting **No** for **Enable Application Insights**.
 
+    ![Create an Azure Function App to host the custom allocation function](./media/how-to-use-custom-allocation-policies/create-function-app.png)
+
 4. On the **Summary** page, select **Create** to create the function app. Deployment may take several minutes. When it completes, select **Go to resource**.
 
 5. On the left-hand pane of the **Overview** page, select **+** next to **Functions** to add a new function.
 
+    ![Add a function to the Function App](./media/how-to-use-custom-allocation-policies/create-function.png)
+
 6. On **Azure Functions for .NET - getting started**, for the **CHOOSE A DEPLOYMENT ENVIRONMENT** step, select the **In-portal** tile, then select **Continue**.
 
+    ![Select the portal development environment](./media/how-to-use-custom-allocation-policies/function-choose-environment.png)
+
 7. On the next page, for the **CREATE A FUNCTION** step, select the **Webhook + API** tile, then select **Create**. A function named **HttpTrigger1** is created, and the portal displays the contents of the **run.csx** code file.
 
 8. Reference required Nuget packages. To create the initial device twin, the custom allocation function uses classes that are defined in two Nuget packages that must be loaded into the hosting environment. With Azure Functions, Nuget packages are referenced using a function.host file. In this step, you save and upload a function.host file.
@@ -137,7 +143,13 @@ In this section, you create an Azure function that implements your custom alloca
         </Project>
         ```
 
-    2. On the **HttpTrigger1** function, expand the **View Files** tab on the right side of the window. Select **Upload** and browse to the **function.proj** file you saved previously and select **Open** to upload the file.
+    2. On the **HttpTrigger1** function, expand the **View Files** tab on the right side of the window.
+
+        ![Open view files](./media/how-to-use-custom-allocation-policies/function-open-view-files.png)
+
+    3. Select **Upload** and browse to the **function.proj** file you saved previously and select **Open** to upload the file.
+
+        ![Select upload file](./media/how-to-use-custom-allocation-policies/function-choose-upload-file.png)
 
 9. Replace the code for the **HttpTrigger1** function with the following code and click **Save**:
 
@@ -284,7 +296,7 @@ In this section, you'll create a new enrollment group that uses the custom alloc
 
 1. Still on the [Azure portal](https://portal.azure.com), open your Device Provisioning Service instance.
 
-2. Select the **Manage enrollments** tab, and then click the **Add enrollment group** button at the top of the page.
+2. Select **Manage enrollments** on the left pane, and then click the **Add enrollment group** button at the top of the page.
 
 3. On **Add Enrollment Group**, enter the following information, and click the **Save** button.