A method and apparatus for controlling or regulating a folder of a printing press is disclosed. Setpoint fold values are generated on the basis of prepress stage data and printed copies are measured in the folded and/or partially folded state in order to determine actual fold values. The actual fold values which are determined in the process are compared with the corresponding setpoint fold values and, as a function of this comparison, the folder is set automatically in such a way that the actual fold values correspond to or are approximated to the setpoint fold values in subsequent printed copies.