Question about Lightroom Print module

Hi,

I just got Lightroom 4 and I'm using the print module, very happy with the controls and configuration, etc, but I am unsure about one thing:

When I am preparing an image to print, how do I know which image is actually being printed? The reason I ask is because when I am working on the image in the Develop Module, there is a feature that let's you take a snapshot of the file as it exists at any particular moment, like if I like the overall effect. Then I might do some more changes, and I can take another snapshot and save that version.

So when I'm in the Print Module, how do I know which of these images I'm actually printing? Like which snapshot or version of the file?

Thanks,

Robert.