Simply click the "move" icon in the top left of an image and drag the photo to reorder
If you'd like to change the order in which your photos appear on your space page it's really easy!
Click "Edit" on the space you'd like to edit photos for
Navigate to the "Space Description & Photos" page on the left
Hover over the photo you'd like to reorder. In the top left of the image, you'll see a white "move" icon. Click and hold this while dragging the photo to its new location.
Scroll to the bottom of the page and click "Save"