8. A print shop management system comprising a data processing apparatus having a non-transitory memory storing a computer software program and a processor executing the software program, wherein the program includes a program code configured to cause the data processing apparatus to execute a process for customizing color or black and white printing of a document containing color and black and white pages, which process comprises the steps of: (a) extracting meta-data of the print job to identify color pages of the document that are originally set to be printed in color; (b) providing a user interface for editing the meta-data by allowing input of individual page numbers designating which color pages of the document will indeed be printed in color; (c) detecting whether there is a constraint of color page and black and white page printing mismatch in a duplex or N-up printing of any pages of the document; and (d) when no constraint is detected in step (c), printing the document according to the edited meta-data by printing color pages of the document in color if they are also designated to be printed in color, and printing color pages of the document in black and white if they are not designated to be printed in color.
10. The system of claim 8 , wherein the process further comprises of using the saved original meta-data for printing the document if the input is blank.