An assembly for controlling individual positioning elements in a delivery region of a sheet-fed printing machine, comprising at least one computer, at least one input device connected to said computer for inputting therein characteristic data specific to a sheet and/or to the printing machine, said computer having means for further processing said characteristic data, and a control device operatively connected to said computer and having individual positioning elements for causing a format-dependent adjustment in accordance with said inputted characteristic data, said computer having means for calculating, from said characteristic data, kinetic energy of the sheet oncoming to the delivery region and for calculating a frictional force for at least one individual positioning element in the delivery region so that frictional energy withdrawal by the individual positioning element is substantially equal to the kinetic energy of the oncoming sheet in the delivery region, said control device having means for actuating said individual positioning element in accordance with the calculated frictional force.