A device comprising: a display; and a controller configured to: segment handwritten content into a plurality of objects by grouping strokes included in the handwritten content, process the plurality of objects in a form of a selectable object, and control the display to display the handwritten content including the processed plurality of objects, the device characterized in that: the controller is further configured to: extract multi-scale characteristic information comprising characteristic information extracted from objects of the plurality of objects segmented at a respective plurality of higher segmentation levels, wherein the plurality of higher segmentation levels indicate segmentation levels higher than a stroke-based segmentation level, classify the selectable object into an object type using the multi-scale characteristic information, control the display to display a label indicating the object type corresponding to the selectable object, receive, on a user interface displayed on the display, an input for selecting the selectable object during predetermined time, and switch an operation mode to an edit mode for editing the selectable object based on the input being received, wherein the input comprises a hovering input for the selectable object, and wherein the hovering input indicates an input in which a touch tool approaches the display within a predetermined distance, wherein, in the edit mode, the controller is further configured to: provide a graphical user interface, GUI, for adjusting a segmentation level of the handwritten content, wherein the segmentation level indicates units for segmenting the handwritten content, and wherein the segmentation level is classified as document, text/non-text, paragraph, text-line, word, character, or stroke, and change a segmentation level of the handwritten content according to a position of an adjustment button included in the GUI. a display; and a controller configured to: segment handwritten content into a plurality of objects by grouping strokes included in the handwritten content, process the plurality of objects in a form of a selectable object, and control the display to display the handwritten content including the processed plurality of objects, segment handwritten content into a plurality of objects by grouping strokes included in the handwritten content, process the plurality of objects in a form of a selectable object, and control the display to display the handwritten content including the processed plurality of objects, the device characterized in that: the controller is further configured to: extract multi-scale characteristic information comprising characteristic information extracted from objects of the plurality of objects segmented at a respective plurality of higher segmentation levels, wherein the plurality of higher segmentation levels indicate segmentation levels higher than a stroke-based segmentation level, classify the selectable object into an object type using the multi-scale characteristic information, control the display to display a label indicating the object type corresponding to the selectable object, receive, on a user interface displayed on the display, an input for selecting the selectable object during predetermined time, and switch an operation mode to an edit mode for editing the selectable object based on the input being received, extract multi-scale characteristic information comprising characteristic information extracted from objects of the plurality of objects segmented at a respective plurality of higher segmentation levels, wherein the plurality of higher segmentation levels indicate segmentation levels higher than a stroke-based segmentation level, classify the selectable object into an object type using the multi-scale characteristic information, control the display to display a label indicating the object type corresponding to the selectable object, receive, on a user interface displayed on the display, an input for selecting the selectable object during predetermined time, and switch an operation mode to an edit mode for editing the selectable object based on the input being received, wherein the input comprises a hovering input for the selectable object, and wherein the hovering input indicates an input in which a touch tool approaches the display within a predetermined distance, wherein, in the edit mode, the controller is further configured to: provide a graphical user interface, GUI, for adjusting a segmentation level of the handwritten content, wherein the segmentation level indicates units for segmenting the handwritten content, and wherein the segmentation level is classified as document, text/non-text, paragraph, text-line, word, character, or stroke, and change a segmentation level of the handwritten content according to a position of an adjustment button included in the GUI. provide a graphical user interface, GUI, for adjusting a segmentation level of the handwritten content, wherein the segmentation level indicates units for segmenting the handwritten content, and wherein the segmentation level is classified as document, text/non-text, paragraph, text-line, word, character, or stroke, and change a segmentation level of the handwritten content according to a position of an adjustment button included in the GUI.