HP Color LaserJet CM1312 MFP Serie Guide De Référence Rapide page 5

Without changing the orientation, remove the printed stack
5
from the output bin, and then straighten the stack.
6 Maintaining the same orientation, place the stack of media in
the input tray again. The printed side should be facing down
with the top edge feeding into the product first.
7 When the message [OK] to print appears on the control-panel
display, press OK.
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[OK] to print