Thank you for the instructions which I printed off and ten minutes later I had the HTC keyboard and my mobile.
Previously I had used all the keyboards (Chinese, Android, Korean and Japanese). I found that they all had at least one thing I liked that the others did not have, but always found the font size too small.
The best keyboard I found was ThickButtons which also had a great dictionary and I was able to read the font without squinting - my age I'm afraid.
I would rate the HTC second to ThickButtons as I tend to catch the letter either side of the one I am pressing. Can the keys be enlarged?