While creating any machining sequence, you can use the tool preview icon
or the
Tool Preview option on the shortcut menu to preview the cutting tool in the graphics window. The initial position of the cutting tool preview is based on the settings of the machining sequence. The position can be a start point, from point, retract plane, or a model boundary. The tool position near the model boundary is computed based on the outline of the workpiece, reference part, or top assembly.