The answer is probably out there online or in the Help, but I'm sleepy enough that I can't come up with the proper search terms at the moment.
I used to be able to do this in Acrobat Pro, but it seems that didn't come with my CS5 setup, and the version I have is probably too old to install onto Win7.
* Which I've discussed before under f-lock, but not this specific plan publicly as it's a surprise for someone who occasionally reads my f-list.
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