I was about to remind Roy that updating to Sierra may affect his PSE (version unknown) in another thread when I thought I would do some more testing. Whether it has been solved by a recent Apple update or eliminated by me I do not know but I have now a fully working print module - the prints no longer have the central part of the image surrounded by a large border.
I deleted all my presets and, starting from the default, made new ones. The prints are now full A4 frame.
Thanks Rick for what was almost a warning re PSE. Am now using version 14 so perhaps no problem with that if I update to Sierra. I assume that you did mean PSE and not Lightroom where there is a print module.
Sorry to report that the printing error in PSE 11 has returned and this time I have been unable to clear it. When printing only the central part of the image prints. I'll lie down in a dark room and try and think through the problem.
I can work around it by saving as a pdf or jpeg and printing from that image using another application programme.