Before, creating a Sub-Showroom, please read this article to understand how Sub-Showrooms work and their specific limitations.
Create a Sub-Showroom
Click the Showroom icon in the left hand panel to open the Showrooms Menu and click "Add Showroom."
3) A window will pop up displaying your options. Select which Master Showroom you want to create the Sub-Showroom under by clicking the "Sub Showroom Under" and selecting your Master Showroom in the drop down menu.
4) Click "Create" to finish
5) In the next window, enter the new Sub-Showroom's name and configure basic settings.
After clicking "Create Showroom" you will be able to access the remaining Showroom Settings.