When working on changes to your site, you can see a preview of what those changes would look like before publishing them to the live site. Preview is available in both Desktop and Mobile views.

Desktop

When you're in the editing window of a page, you will have a link toward the top to Preview Page, which will open a new tab and display the preview of your changes. 

At the top right of NexCite admin, there is a computer monitor icon.  When you hover your mouse on this icon, an option to Preview Site will show. This will open a new tab and display the preview of your changes.

Mobile

At the top right of NexCite admin, you will have a phone icon.  When you hover your mouse on this icon, an option to Preview Site will show which will open a new tab the approximate size of a phone window and display the preview of your changes.