Restrictions on Previewing and Printing Documents
If you are printing a PDF file that does not have embedded fonts, it may be printed with different fonts. In such a case, you may be able to improve the result by using the Data Conversion Service.
If the preview is not displayed satisfactorily during PDF printing, you may be able to improve the result by using the Data Conversion Service.
PDFs that have been encrypted using 256-bit encryption, encryption by digital certificate, etc. cannot be previewed and printed with Canon PRINT Business. To preview and print with Canon PRINT Business, change the encryption level of the PDF on the computer.
Also, you can select an app to display a preview by tapping the file icon on the document preview screen.