Make a PDF from a Pages, Word or Google Doc

At my college, we use the document management system called Moodle. It is not the greatest course management system out there, but it is free, and many colleges choose to use it. When students upload documents to Moodle, they can do so as Word, Pages, or Google Docs, and they can also use plain text. But when professors interact with these docs, it is incredibly clunky because the documents need to be downloaded before anyone can read them. Uploading PDF files makes this process so much easier because the system can render a PDF without downloading the document. So I created a little tutorial for students who might not know how to save a document as a PDF file. This tip might seem obvious for many, but it is surprising how many students have no idea how to do this. So for them, here you go. Enjoy.