The following instructions are for Microsoft Word, but are similar for all programs in Office.
If the file was previously saved, select File > Save a Copy.
If the file is unsaved, select File > Save As.Select Browse to choose the location on your computer where you want to save the file.
In the drop-down list, select PDF.
Select Save.
For specific programs, iOS or Mobile version, or to find out how to customise the PDF visit: