On-Page Editor Settings allows you to update various Visual Composer settings directly from the Frontend editor. To access Editor Settings click the ‘Settings’ icon in your Navigation bar and scroll down to the Editor Settings section.
As a pro or regular user of the Visual Composer, you may know all the elements and templates in your list by heart. As a result, there is no need to see element preview and description upon hover. Disable preview option allows you to easily disable preview and description of elements and templates that are already added to your list.
Note: You will still see element and template preview in the Visual Composer Hub.