Sony PRS-50X owners will already be aware of this, but for the rest of us note that the
eBook Library Software for your PC acts as a Windows ebook reader and does not need a PRS-50X. It now supports ePub, so it is an alternative to Adobe DE for Windows. See the attached screenshots of Sony and Adobe on an ePub of
Alice's Adventures in Wonderland. The attachment shows the standard view which always uses about a 600x800 pane to display the ebook, but there is also a full screen view which may be better for actually reading ebooks. I think the 600x800 view is effectively emulating the PRS-505, but I'll leave it to PRS-505 owners to comment on how close the emulation is. If it is close, then this provides one way to get "screenshots" of what the PRS-505 will show. I tested a PDF and it looked identical, although I did not find a rotate option for the Windows version, see
Full size .pdfs - screenshots and/or best option available now? (posts 7 & 9, photo from post 9).