I'm having a slightly different problem. I have an image, 900px by 375 px. I want to merge that with a 900px x 675px image on another layer, but I want the 900px x 375px image to be in the center of the composite.
I'm faiirly new to paint.net , but it seemed like the solution was to use the Image->Canvas Size command, where I can create a larger canvas size, and place my image in the center. The instruction for paint.net say the enlarged canvas will be transparent, but mine is white, and I cannot figure out how to change it to tranparent.
Can someone provide a little guidance?
Thanks,
Harry