This article will show you how to edit the order of photos in a Photo Gallery album.
Who can use this feature?
System Administrator | Owner
Instructions
Go to Modules and, on the Content tab, select Photo Gallery:

Locate the Albums section and select the Photo Album you want to edit:

With your mouse, hover over the photo you would like to move and use the arrows to move the photo up or down:

Note:
You can also move a photo by dragging and dropping it with your mouse.
The new photo order will automatically save.