How do I change the order my images are shown in?

Next to each image in a gallery, you'll see an icon (as shown in the screenshot below).

To swap the position of images in a gallery you'll need to click this button and then, whilst holding down your mouse, move the image into a new position.

As you move the image up/down the page you should see other images move out of the way.

Once you've finished don't forget to save your changes.