You can upload and link to a PDF file very easily.
1. Assuming you have already created the PDF, go to the page you wish to link to the PDF file.
2. On that page, enter the text you wish to discribe the PDF and Select it. (highlight)
3. Then in text box Menu Click on Link - File
4. From here Browse to your file on your computer and Drag and Drop the PDF in the Box
That should do it.
