Designs can be turned into Master Templates, meaning they are published "Live" in a category available to users.
Designs that are not master templates are just personal versions saved to a particular dashboard.
1. Find the design in the Admin panel by clicking the Designs dropdown -> Designs
2. The list of designs will populate newest to oldest. The quickest way to search for a design is to use the side Filter panel and search by User
3. Click the design's Actions dropdown -> Edit
4. Select Is Template
5. Choose a category or multiple categories (and subcategory if applicable).
6. Scroll to the bottom of the page and click Update Design
You can also use Batch Actions from the main Designs list by choosing Set As Master Template. This will automatically open up the Category list to assign your multiple designs. They will automatically be set as Masters.