An image processing apparatus includes a reading unit configured to read a document to generate a document image, a display unit adapted to superimpose said document image on a sheet image indicating a sheet used for printing, so as to distinguishably display both an area where the document image is set to be printed and an area where the document image is not set to be printed, a receiving unit adapted to receive a drag operation by a user on the document image displayed by the display unit and a changing unit configured to change a print setting for printing the document image on the sheet based on the drag operation received by the receiving unit.