You can preview any design on any of your tours. This is a great way to show Agents multiple options without having to create multiple tours. You can leverage one tour to show many different features.
The best way to do this is directly in the tour editor itself
To do this, click edit next to your tour, then scroll to the Design options. Here you can select a design from the drop down, then select Preview Design.
The tour will pop up in a new tab, and you can retrieve the URL from there. As you change the design and click preview, you will notice the last string of numbers will change: