At setup time, you can define machine zones and locate clamps in a sheet metal manufacturing model. A machine zone is the area that can be machined without repositioning the workpiece. The workpiece can be repositioned in one direction only, along either the x-axis or the y-axis of the machine coordinate system. If you want to switch the direction of repositioning, delete the existing machine zone definition and create a new one. You can also redefine an existing machine zone.