PDF created with Illustrator is showing hidden layers. Sometimes.
I admit I am an Illustrator noob. I'd like to understand what is happening here, and avoid it if I can. I created a PDF from an illustration, after hiding a couple of layers. I thought that the PDF would only have the layers that were visible, and when I open it in all the various readers I have on my PC, that was the case. Recently, though, a friend printed it from his Mac (I'm not sure which app), and ALL the layers printed on top of one another. How can I prevent that extra information from being in the PDF in the first place? TIA!
