Star PT-10Y Mode D'emploi page 7

Loading fanfold paper 5
Pull the gray levers on the tractors up to unlock the tractors, and slide the
tractors into position so that they are aligned with the holes in the fanfold
paper.
Once the tractors are aligned the way you want, push the gray levers back
down to their original positions to lock them in place.
Open the covers of the tractors and align the paper so that the pins on the
tractors are inserted into the holes of the paper.