The question in the last post could be irrelevant if I don't get my act sorted soon.
I've spent the last hours (maybe one but it seems longer) battling with Photoshop. I bought the software last weekend and have no idea how to use it (so I did a pretty good job on the cover, bearing that in mind) and am struggling to put a simple thin grey border (that Amazon says is necessary for pale covers) around my image. The best I've been able to come up with is a pre-designed border of 10 pixels, which I think is a bit thick. But I can't change it. Nor can I work out the size of my image in pixels.
I'm going to go and ice a cake and sulk now.