16. The computer program product according to claim 15 , further comprising: determining whether or not a change beyond a specific criterion has occurred in the text in the range specified by the received range specifying operation, wherein at the time of performing the text pasting processing, the specific text stored in the storing unit is displayed on the display device on a condition that it is determined that a change beyond the specific criterion has occurred in the text in the range.
17. The computer program product according to claim 16 , further comprising periodically acquiring positional information on a rectangular region displayed in order to represent the text in the range specified in the range specifying operation, in accordance with progress of the range specifying operation, and determining, based on a rectangular region of acquired positional information not containing a rectangular region based on immediately previously acquired positional information, that a change beyond a specific criterion has occurred in the specified range of text.