The subject matter discloses examples of a print interface manager. The print interface manager comprises a print area selection engine to receive a user instruction for printing print data on 5 a user defined print area of a print media. In response to the user instruction for printing print data, the print interface manager obtains a print area input defining the print area, wherein the print area input indicates a matrix block corresponding to user defined print area of the print media. The print 10 interface manager further provides the print area input to a print unit to print the print data in the user defined print area of the print media.