Tabs are required to hold the component firm during the milling process. These tabs must be durable enough to support the weight of the part, as well as, resist the cutting forces applied by the milling machine. However, once the milling process is finished these tabs must be removed without damaging the part or obstructing its function. Begin by selecting the top view from the upper toolbar. The various viewing options are shown as cubes with highlighted faces to depict each surface. Next, click on the face of circular region shown in the top view. Figure 12 details the colored shading that occurs when the surface is selected.