Brian,
Thank you for the comment. In order to mirror a page element you must enable mirroring on that particular page element. You can do that when you create a page element or edit that page element to have mirroring enabled. Once you add mirroring to the page element you will want to click on the little mirror icon under the element to add it to your mirrors. Once you add it to your mirrors that page element will be selectable on the Sport Ngin mirror page element.
Here is a help article: https://help.sportsengine.com/en/articles/6513392-how-to-enable-mirroring-on-a-page-element
Thank you,
