OK, Many thanks to everyone on the helpful replies to my last request. Especially that last one as it worked perfectly! (Skwire).
I have a situation where I need to do something with a pdf that I cannot find much information on other than the fact it exists.
Just like in CS5 and some other art programs, Adobe PDF's supposedly can be made with a background property of transparent.
I would like to be able to use this ability to stack multiple transparent overlays on top of on regular pdf that has normal black and white text.
Each of the overlays would need to be a separate file-name.pdf. Each would need to allow only a single color for the text written on it.
The result would be an electronic version of an overlay book. I need to keep it in pdf due to the (at least passable) security offered by pdf files.
I wish i knew of something better for security though. I have talked to a place called lock-lizard but could not get any real feel for how much better
if any, their protection scheme might be. So I guess a 2nd request would be for any kind of protection that can be placed on a document. The intent is to prevent copying, printing, editing. The usual stuff. But it has to be put on a webpage so... not much I can do.