Catherin- When you first get to the window that says, "Small Fonts", there should be a little down arrowhead to the right. click on it to get to "Other".
Then a Custom Font size box should pop up. Change the 100% to 75%. If it goes away, start over.
Note: This is not easy to understand until it starts working right again and you can see cause/effect. I have two computers. One with Paf 4; One with PAF 5. Both of them were messing up. It is an interaction between the video cards and the monitors. I switched monitors between computers, and both computers then performed satisfactorily.
In my first posting on this thread, I referenced a posting in another thread. Look at it. Perhaps it is more clear. Perhaps I posted something else on another thread. I do get carried away at times. Also read your PAF 5 Help. It is a common problem - assuming you are having the problem I think you are.