If you don't want to just copy and paste to reformat in Word, you'll need to convert your file to a format that can be read by Microsoft Word. Go to a file converter website such as: https://cloudconvert.com/pages-to-doc
TIP: To avoid having to go through the above conversion process, save your Pages file as .RTF (rich text format) which will allow any software program to read the file. It is a more universal format, like .PDF. Saving as a PDF, however, will not allow you to edit the text as easily later on.
