Canon PIXMA MG4200 Series On-Screen Manual page 934

4.
Hold the jammed paper with your hands.
If the paper is rolled up, pull it out.
5.
Pull the paper slowly not to tear it, then pull the paper out.
6.
Make sure that all the jammed paper is removed.
If the paper is torn, a piece of paper may remain inside the machine. Check the following and remove
the piece of paper if it remains.
Does the piece of paper remain under the FINE cartridge holder?
Does the little piece of paper remain inside the machine?