Maybe the printer doesn't need to know. In the case of the Dell printer, if I chose labels, it would heat up the fuser for a longer time (compared with plain paper) before it pulled the paper in. The goal, I guess, was to make sure the toner was really "stuck" to the paper, since mailing labels endure some abuse. But maybe Canon does fine with the normal heat-up time for the fuser.
OTOH, if you can set it on the printer menu, then it must serve some purpose.
The driver settings on the computer would only be able to adjust the paper size and paper source for your print job. Unfortunately, the only way to set the media type would be through the menu found on the printer's operation panel. For any in depth walkthrough on the driver settings available for your specific OS, you can contact support over the phone at 1-800-652-2666. Our agents would be happy to assist.
09/26/2023: New firmware updates are available.
08/18/2023: Canon EOS R5 C training series is released.
07/31/2023: New firmware updates are available.
05/31/2023: New firmware updates are available.
05/18/2023: New firmware updates are available.
03/30/2023: New firmware updates are available.