Minor edits

Author: w-azure

articles/iot-edge/how-to-provision-single-device-linux-symmetric.md

@@ -158,7 +158,7 @@ Use the `check` tool to verify configuration and connection status of the device
 
    Check that your device and modules are deployed and running, by viewing your device page in the Azure portal.
 
-   :::image type="content" source="media/how-to-provision-single-device-linux-symmetric/modules-deployed.png" alt-text="Screenshot of IoT Edge modules deployed and running confirmation in the Azure portal.":::   
+   :::image type="content" source="media/how-to-provision-single-device-linux-symmetric/modules-deployed.png" alt-text="Screenshot of IoT Edge modules deployed and running confirmation in the Azure portal." lightbox="media/how-to-provision-single-device-linux-symmetric/modules-deployed.png":::   
 
    Once your modules are deployed and running, list them in your device or virtual machine with the following command:
 

articles/iot-edge/includes/iot-edge-register-device-symmetric.md

@@ -95,7 +95,7 @@ Devices that use symmetric key authentication need their connection strings to c
 
 The edge-enabled devices that connect to your IoT hub are listed on the **Devices** page of your IoT hub. If you have multiple devices, you can filter the list by selecting the type **Iot Edge Devices**, then select **Apply**. 
 
-:::image type="content" source="media/iot-edge-register-device/portal-view-devices.png" alt-text="Screenshot of how to view your devices in the Azure portal, IoT Hub.":::
+:::image type="content" source="media/iot-edge-register-device/portal-view-devices.png" alt-text="Screenshot of how to view your devices in the Azure portal, IoT Hub." lightbox="media/iot-edge-register-device/portal-view-devices.png":::
 
 When you're ready to set up your device, you need the connection string that links your physical device with its identity in the IoT hub. Devices that authenticate with symmetric keys have their connection strings available to copy in the portal. To find your connection string in the portal: