1. A printer, comprising:a printing unit;
multiple pallets to support a print media through a print zone near the printing unit, each pallet smaller than the print media;
multiple suction cups in each pallet, each suction cup having a port through which air may be evacuated from the suction cup;
a track to circulate the pallets endlessly through a loading zone in which print media is loaded on to some of the pallets, past the printing unit in a temporary grouping to support the print media through the print zone, and through an unloading zone in which print media is unloaded from the pallets; and
a vacuum source to apply a vacuum to some or all of the suction cups in each pallet in the print zone.