I've found the diopter adjustment. I had already set it correctly. As soon as I read the info it clicked. I remembered reading about it when I got the camera. I just had forgotten and didn't know the terminology. I will have a bit of a play this weekend coming up. I suspect I need new reading glasses anyway though it could just be reading a few full books with only bifocals have strained my eyes. ( still not sure where my "readers" are)
Thanks for the additional hints both of you.