Add a PDF file to your Canva account. You can (a) click Create > Upload, then browse your device for the PDF file; (b) select the Projects tab, then scroll down and click on your Uploads folder. Click on the three dots in the upper righthand corner, and select Upload files to add a PDF from your device; or, alternatively, (c) click Import, then select from Google Drive, OneDrive and Dropbox. Pick your desired app, then login to connect and import your PDF.