In My Forms, select the document you want to add pages to.

Select "more" in the toolbar, click add pages, choose the number of pages to add, and click the add pages button.

When you open your document, you'll see your new blank pages in the sidebar on the left.

Add blank pages is just one of the many powerful PDF editing features PDFfiller has to offer.

Learn more here: https://www.pdffiller.com/en/functionality/22755-add-page-pdf-document-form-file-online-mac-windows-tool-mobile-software-service