- Click “Photo Gallery” from the menu on the left of your WordPress dashboard.
- From the list under Photo Gallery, click “Themes.”
- Click “Edit” under the theme you’re using.
- Select the layout you’re using from the buttons under Theme title.
- Find the option named “Alignment” and select “Center” from the drop-down menu.
Note: “Theme” options are only available in the premium version of Photo Gallery.