English
1.Insert the paper roll spacer so that the front edge goes through the notch and down to the shaft, as shown below.
notch
roll paper
front edge | spacer |
2.Push the paper roll spacer until you feel it click onto the shaft.
Note:
Check that the paper roll spacer slides smoothly to the left and right.
shaft
inside edge of 
the spacer
3.Slide the roll paper spacer to the appropriate width, as shown above. You can use the measurement printed inside the printer, aligning the inside edge of the spacer with the desired measurement.