PS I’d like to add images are only scaling themselves down if they are too big in the horizontal/ X direction. An image I’ve just tested with that is over 640 high but 400 or so in width was unaffected when fiddled with. If that makes a difference in what the problem could be.
Also the template I’m using is based on the default one- so the width should be big enough anyway to allow images of 640 pixels wide without having to scale them.
Thanks