In MEP 14 there is a directory named Manual, containing a PDF document of 385 pages.
MEP 14 is Movie Edit Pro 14 ! Try to find a sub-directory with about the same name under the Magix directories. (In my MEP 14+ there are 2 Magix dir., 1 under "My documents", and 1 under system disc C:
If you got the disc version, the PDF manual is already on your hard drive after installation. Find it as per the previous poster's instructions.
Plus, if you got the download version of the program, you would have received an additional download link for the PDF manual in your e-mail with the activation details. You can grab the PDF file here: