The blue circle will display how many images are in the page gallery.
is there for you to add image or images. You can add images one at a time, but you can also add multiple images.
The table below will show the images that are in the page gallery
The button here will disable/enable the visibility of the image in the gallery for language that is selected
Order of the item can be altered with and
To edit the details of the image click at icon
will permanently remove the image from the gallery