If you have already uploaded and used a PDF elsewhere on your site and want to link to it again on a different page, there is no need to upload it again. You can search for it in the media library and insert it into your text.
- Select Add Media.

- Select Library (instead of Upload, as you did when adding a new PDF).

- To search for the PDF you want to add to the page, enter a relevant keyword under File name, then select Apply.

- In the search results, find and click on the file you want to add to the page.

- Scroll down to the bottom of the file window and click on Submit. Then on the next screen, click on Submit again.

- Now, follow step 7 from Add a PDF to a Page so that you can change the file name to an appropriate title for the document.