Do you have a video for this? If not I have a simple white border around my photo now how do I make it look like a bevel so it looks like a real matt?
Not being able to see what you want, you mentioned a black line so... why don't you use an outer border of .01 with a black color? For example, let's say your existing white border is 1/4 inch. Keep your inner border set to .25 with a color of white and your outer border to .01 with a color of black. That way you'll get a thin black line around the whole thing. If you want to get more complicated than that and do something like a frame, you could add a cutout in the image editor.
Mike