Do not know, what you are talking about. The standard size of the working box is 2.54 inch or 0,76 m. Just open a standard scene. You can resize the working box, for architecture I choose 20 m, but the camera moving tools are build for the standard size and this define the standard of the software. Johannes Even a terrain with 30*30 km is resized to 2,54 * 2,54 meter (with standard settings).