A method includes storing, in response to marking by a user of an area of a displayed document, information on the marked area; displaying an icon representing the marked area; conducting the storing operation and the displaying operation for a different area; and creating, in response to an operation by the user for arranging two or more icons to be in contact with each other, a joined icon by joining the icons together; and combining marked areas represented by the two or more respective icons, according to a state of contact. A corresponding computer program product and computer system are also disclosed herein.