You can create a link via the email module or PageBuilder page by:

In Plain text format:
  1. Select the "Links" menu.
  2. Select Document Library.
  3. Search for the document you would like a link produced for.
  4. Select Insert and it will prompt you to enter text that will show for the link, or if you select to include none it would produce the full url.
In WYSIWYG format:
  1. Select "Insert/Edit url or Link" which is the chain link icon.
  2. Select Browse links and choose Document Library.
  3. Find the document you would like to use.
  4. Make changes to any options you would like to include and go to the next page.
  5. Select Insert.
The document library urls are always produced in a similar format so if you just want the url you can append the document file name at the end your site url format.