If you install the script and actions as instructed above, it should work out of the box with images with a minimum short side of 1500 px. It is meant to be run by using one of the ready-made actions, or by a droplet made from one of those actions. It will automatically apply a border, the style of which depends on whether it’s a 2:3 image, a 4:3 image, a 6:7 image, a 4:5 image or a 1:1 image.