It's not clear what you're asking.
However, if you're using a Mac that has a Retina display, there have been problems reported similar to yours.
If that is the case, you'll need to disable the Retina feature when editing with Premiere Elements (at least until Apple addresses the problem).
Try each--Quick or Expert screen.
Thanks for getting back. Yes I found out about the retina display also.
It is the problem.