You can view how your live site looks in both Desktop and Mobile views.

Desktop

At the top right of NexCite admin, there is a computer monitor icon.  When you hover your mouse on this icon, an option for Live Site will show, which can open a new tab and display the live version of your site.

Mobile

At the top right of NexCite admin, you will have a phone icon.  When you hover your mouse on this icon, an option for Live Site will show, which will open a new tab the approximate size of a phone window and display the live version of your site.