nik.73's dashboard

I know the answer is probably here somewhere but I cannot find. Can someone help me please. I want to have a pdf file to show on a page as soon as the user click on that tab without having to click a link that opens the file. I want the pdf displayed right on the page (i.e. I have a calendar which was created in Excel & converted to a pdf). I can't figure out how to do that without creating a link. Thanks!