add lightbox

Author: sdgilley

articles/machine-learning/quickstart-create-resources.md

@@ -55,7 +55,7 @@ Create a *compute instance* to use this development environment for the rest of
 1. If you didn't just create a workspace in the previous section, sign in to [Azure Machine Learning studio](https://ml.azure.com) now, and select your workspace.
 1. On the left side, select **Compute**.
 
-    :::image type="content" source="media/quickstart-create-resources/compute-section.png" alt-text="Screenshot: shows Compute section on left hand side of screen.":::
+    :::image type="content" source="media/quickstart-create-resources/compute-section.png" alt-text="Screenshot: shows Compute section on left hand side of screen." lightbox="media/quickstart-create-resources/compute-section.png":::
 
 1. Select **+New** to create a new compute instance.
 1. Supply a name, Keep all the defaults on the first page.