How to preview your mobile skin on your PC or Mac.
In VT Pro, click Preview and when you see the tour appear, press Ctrl + N to open the tour in your browser. You can also set Preview to default when opening in browser under the Edit > Preferences menu.
Then, within your browser, go to Developer Tools. In Chrome, that's F12 as a shortcut.
Then select your preferred device to display on the left side and refresh the page for mobile version (shortcut: F5).