PDF Setup for Selected Files window is cropped, won't resize, cannot set page height

In FrameMaker 13.0.1.385,  when saving a book as PDF, the "PDF Setup for Selected Files" window shows up as displayed in the enclosed image. This is cropped such that I cannot enter values that are hidden. In particular, the "Height" for the page cannot be modified, something that I need in this case (it's defaulting to 11").

I cannot resize the window. Hitting "CR" will at least perform the next action of creating the PDF.

Help.

thanks,

scott