I would like to adjust the aspect ratio of a rather large (3300 x 2550) .jpg image. The image is set on a black background, and all I would like to do is add more black space on the left and right sides of the image.
I think I could probably accomplish this in Keynote (which I do have installed) but I thought I would ask here first since most of my image editing experience is somewhat amateurish.
Does anyone know of any (free) software for Mavericks that could do this?