Canon PIXMA MG4200 Series On-Screen Manual page 887

6.
Pull out the jammed paper slowly.
When you pull the jammed paper, support the machine with your hand so that it does not fall down.
Note
If the paper is rolled up and it is difficult to remove, grasp the edges of the paper, then remove
the jammed paper.
If you cannot remove the jammed paper from the transport unit, close the transport unit, stand the
machine upright, then open the paper output cover to remove the paper.
Paper Is Jammed inside the Machine
7.
Close the transport unit.
Note
After you close the transport unit, do not keep the machine standing upright.
8.
Plug the machine back in and turn the machine back on.