Patent ID: 8767255

Claim:
A control method of an image forming apparatus which is connectable to an external apparatus, supports a resource saving mode, and outputs document data, the control method comprising: selecting the document data to be output; selecting an output option from among output options to be applied to the selected document data; comparing a resource saving value corresponding to the selected output option to be applied to the document data and a resource saving set value; displaying at least one suggestion option, which saves resources, of the document data according to a result of the comparing, wherein the at least one suggestion option is associated with the resource saving set value; receiving a user input command to change the resource saving set value, comprising inputting by manipulating a scroll bar or inputting a numerical value; outputting the document data according to the at least one selected suggestion option corresponding to the changed resource saving set value; and displaying a total cost of the resource saving value corresponding to the selected output option to be applied to the document data and the changed resource saving set value, associated with the at least one selected suggestion option, as a saving cost, wherein if the resource saving set value is changed according to the user input command, displaying the at least one suggestion option corresponding to the changed resource saving set value.