A method for configuring a plurality of objects in a multi-depth tree structure is disclosed. The method comprises: upon receiving a first user command including a node attribute for connecting a first object and a second object and a coordinate attribute for representing a position in the first object, associating the second object with the first object in a first mode; upon receiving a second user command including the node attribute without the coordinate attribute in the first object, associating the second object with the first object in a second mode. In the first mode the second object is inserted at the position indicated by the coordinate attribute within the first object, and in the second mode the second object is inserted into the first object with specifying no position within the first object.