It would be nice if the full size poster could be displayed directly from PVD, even when it's larger than the screen.
I guess that would mean scrollbars on the Picture View window or the option to open the image in an external viewer of choice (and saving the image to a temp folder in the process, I assume).
Personally I'd like something like this.
1. Double-click the image: opens in the View window as now
2. Single-click in the View window: full size image with scrollbars
3. Double-click in the View window: close
4. Right-click in View window: option to open in external viewer
Just some thoughts.