To use this plugin, you must first enable adding IDs to elements in your app, you do this at:
Settings > General > Expose the option to add an ID attribute to HTML elements
Example of how to add a shadow to an element: 1. Add an element to the page, give the element an ID. 2. Add the action (in workflow tab) "Add shadow" on page load 3. Add the ID of the element you want a shadow for and choose the options you want. 4. Done!