The pdf files are generated elsewhere for me to edit and return so I have no control over the actual original file. I tried many optimizers but they didn't really reduce them by much. The originals are about 45 mb and the optimized ones are about 42 mb generally.
With regard to converted to jpg files:
The cutting off depends on which program I use to convert the file. However, if I use a converter which does NOT show cutting off when I open it then, as you suggest, the problem IS with the printing options. Not all programs give you a preview or chance to change the settings. However, on ones that DO give this option (MS Photo Editor) then I find unticking "fit image to frame" or similar solves the problem. So, I have told my recipient about this and they have tried it and it works so I will consider the problem solved.
Thanks for all help.