There's a known issue with MS-Windows when display resolution is not set to normal.
Does this go along with your setup?
You might also wanna take a look at this Bug Report:
Thank you for your post.
The information from "Benjamin Fehr" is correct (Thank you!). In essence, make sure the display of Windows is set to 100%. Set the zoom in FileMaker Pro if you need larger text displayed.
I have attached your post to the original report. When more information becomes available, I will post again.