Canon TS Printers - Where to Insert Tray

On Canon TS printers (TS7xx, TS8xxx, TS9xxx) you insert the tray between the paper output tray and the section above it. You need to push the paper output tray all the way into the printer so it is flush with the upper section. This will form a slot for the card tray to be inserted.

Be sure to follow the Printing Instructions for your specific tray. You do not want to insert the tray until the printer signals that it's safe to do so!