A machine for processing printing material sheets, in particular a
sheet-fed printing press, has a sheet transport drum for transporting the
printing material sheets and at least one sheet supporting element. The
sheet supporting element, which is formed with a sheet supporting
surface, is compatible with the sheet transport drum, for supporting the
printing material sheets in a first operating mode. When the machine is
operated in the first operating mode the sheet supporting element is held
attached to the sheet transport drum, and when the machine is operated in
a second operating mode the sheet supporting element is stored in the
machine detached from the sheet transport drum. A corresponding printing
material processing machine is suitable for carrying out the novel
method.