If you want to watermark a PDF file, you can either insert the watermark into the PDF itself or create a file in another program with a watermark and then transform it into a PDF. For example ...

Instead of providing links to outside sources, you can use Adobe Acrobat to embed a video directly within your PDF file. This will increase the chance of a reader playing the video, but it also ...

Close the Word document (don’t save the changes, if you’re asked) and quit Pages. The PDF you’ve just created can be sent to anyone on any platform, and the embedded links will all work as ...