1. Method for the modification of three-dimensional objects by means of an input device, comprising the following steps: creating a three-dimensional object; displaying a three-dimensional representation of the three-dimensional object on a computer screen; activating the three-dimensional object by way of an operation of the input device relating to the representation of the object; displaying a representation of a three-dimensional coordinate system on the computer screen with the three-dimensional coordinate system being assigned to the activated three-dimensional object; selecting one of the axes of the three-dimensional coordinate system assigned to the object by means of an operation of the input device, with the input operation relating to the representation of the coordinate system displayed on the screen; shifting the origin of the coordinate system assigned to the object within a global three-dimensional coordinate system along a line defined by the orientation of the selected axis of the assigned coordinate system within the global three-dimensional coordinate system, and in one direction (of the line) which is determined by an operation performed with the input device; computing the three-dimensional object relative to the global coordinate system after moving the object in accordance with the movement of the origin of the assigned coordinate system; and displaying a representation of the shifted three-dimensional object on the computer screen.