Developer Mode gives you access to edit and change your site's HTML and CSS. Adding custom code allows for advanced customization that is not possible with the drag and drop editor, however this should only be performed by advanced users with a solid understanding of web development code.
Note
Custom code that is intended to be visible in the site should be added using a HTML widget. Custom code that is not should usually be put in the header. In general, it is always best to first follow the directions provided by the code's writer before adding it to your site.
To access Developer Mode:
back to Custom Code