Hi joelee52,
To adjust the paper thickness setting of the printer, you can enable the prevent paper abrasion setting. To do this, please follow these steps from the printer's operation panel:
1. Press the SETUP button.
2. Use the arrow keys to select DEVICE SETTINGS, then press the OK button.
3. Use the arrow keys to select PRINT SETTINGS, then press the OK button.
4. Use the arrow keys to set PREVENT PAPER ABRASION to ON, then press the OK button.
5. Press the COPY button to return to the main printer screen.
Once you are finished printing the labels, please ensure that the prevent paper abrasion setting is set back to OFF.
If you still experience difficulty, we ask that you please call 1-866-261-9362, Monday - Friday 10:00 a.m. - 10:00 p.m. ET (excluding holidays) for further assistance. A Canon technical support representative will be happy to help. There is no charge for this call.