3. The apparatus of claim 2 , wherein the controller is further configured to determine the first input is used for generating the summary of the document, if the first input is received after a predetermined input is received, and wherein the predetermined input is a predetermined function key input or a predetermined handwriting gesture input for generating the summary of the document.
2. The apparatus of claim 1 , wherein the controller is further configured to determine whether the first input is used for generating the summary of the document or not, in response to receiving the first input.