Controlling an external, stand-alone, application is not easy. To achieve similar functionality, I suppose I could add the possibility to dock and undock the PDFView tabsheet. This way, when floating in its own window, could be freely moved and resized.
I like the idea and I'm going to make some tests. This will brake some code, that correctly relies on the fact the PDFInfo and PDFView tabsheet are not visible at same time, but nothing that can't be worked out