You can preview themes unpublished themes as a manager, admin, or designer. (For more about user roles, see the help article.)
- Sign in to the Control Panel
- Click Tools > Themes
- In the Themes area, look for the Theme selector on the left of the tool bar at the top.
- Click it to open the list of themes.
- Click the theme that you want to preview.
- The theme settings editor will open. Click the Edit and preview checkbox.
- Click Save.
- Go back to the homepage of the website.
- It should now be using the theme that you selected, allowing you to preview it.