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.
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. 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.