How to add custom Javascript and custom CSS style

Command bar > Settings > Page Properties > scroll down to the "Custom Header Code"

If you are including custom code, please remember to wrap the code with the appropriate tags:

JavaScript should start with the "script" opening tag and end with the "/script" closing tag
CSS style formatting should start with the the "style" opening tag and end with the "/ style" closing tag
If not surrounded by the correct tags, your code may not load properly