Canon TS9000 series Online Manual page 152

Don't detect mismatch of paper settings when printing from computer
When you print documents from your computer and the paper settings in the print dialog and the
paper information registered on the printer do not match, this setting disables the message display
and allows you to continue printing.
To disable detection of paper setting mismatches, select this check box.
3. Apply the settings
Click Apply and when the confirmation message appears, click OK.
The printer operates with the modified settings hereafter.
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