Computer help please!!! Re: invites

Hi girls....Im in some desperate need of some help.
Does anyone know how to save or make a PDF file from documents in microsoft word?? I have all the documents for my invitations and inserts saved on microsoft word and the printer called and said i need to send it to him as a PDF file so it will open the same exact way. How can I do this?????? Anyone that could help me I appreciate it.

TIA!!!