Sounds like you want a Button to me. I don't do that sort of work, but you can start with reading about Buttons in the help files.
Please describe what you want to do in better detail.
Are you creating a PDF and want to launch a new PDF from the button?
I'm creating an ePub out of my InDesign document. As you can see here on my dummy, I would like to create a link (a "button"?) that I can click to view a pdf. I don't just want the pdf inserted into my InDesign document, I want it clickable an invisible until you click it. When you click it, I want it to pop up as a pdf-window of its own.
Hmm, am I making any sense heter?
Thanks, I'll look into it!
Way more sense. Thanks.
I've moved your post to the InDesign EPUB forum. You can add a button that will hypelink to a web hosted PDF. It will launch a web browser and you'll be able to see the PDF.
There is, however, no way I know of to embed a PDF into an EPUB.