Device to edit documents for printout and method thereof

A method of generating a first document using a first application program stored in host device and a second document using a second application program stored in the host device and converting the first document and the second document using an image forming apparatus into a first printing data file and a second printing data file and transmitting the first printing data file and the second printing data file to the image forming apparatus, the method comprising:

• sending the first printing data and the second printing data from the host device to the image forming apparatus;
• storing image data files corresponding to the first printing data file and the second printing data file in the image forming apparatus and according to print control instructions received by the image forming apparatus, each of the image data files comprising at least one page of data to be printed and excluding print control instructions;
• displaying a list of image data files excluding print control instructions stored in the image forming apparatus;
• selecting a first image data file and a second image data file from the displayed list of image data files that exclude print control instructions;
• designating a page location of the second image data file in order to insert at least one page of the first image data file;
• and
• merging the selected first image data file and second image data file at the designated page location using the image forming apparatus,
• wherein the merging of the selected first image data and the selected second image data is performed while the selected first image data and the selected second image data exist in an image data format that excludes print control instructions to generate a new merged file including the first image data file merged with the second image data file at the designated page location, and
• printing the new merged file on sheets of printing medium.

An image forming apparatus connectable to a host device executing a printer driver, the host device using the printer driver to convert documents into printer-driver-converted data files and transmitting the printer-driver-converted data files including printer control instructions to the image forming apparatus, the image forming apparatus comprising:

• a communication interface to receive the printer-driver-converted files from the host device;
• a print unit to perform printing operations based on the received printer-driver-converted files;
• a display unit to display a list of image data files stored in the image forming apparatus corresponding to the printer-driver-converted files previously received from the host device, the image data files excluding printer control instructions;
• an input unit to receive user input to select a plurality of image data files from the displayed list, the input unit to receive user input to select a merge option to merge the selected image data files excluding print control instructions and to receive user input to designate a page location where a first one of the selected files is to be inserted in relation to pages of a second one of the selected files;
• and
• a control unit to perform a merging operation to generate a new merged file by merging pages of the selected image data files in an image data format excluding printer control instructions according to the user input designating the page location, and to control the print unit to print the new merged file on sheets of printing medium,
• wherein the merging operation to merge pages of the selected files is performed while the selected files exist in the image data format that excludes printer control instructions.