Copyright Goodheart-Willcox Co., Inc. Chapter 11 Subobject Editing 287 Edge Subobject Editing Edge Subobject Editing Individual edges of a solid can be edited using grips and gizmos in the same manner as faces. To select an edge subobject, press the [Ctrl] key and pick the edge. The edge subobject fi lter can also be used to limit the selection to an edge. Grips on linear edges are rectangular and appear in the middle of the edge, Figure 11-21. In addition to solid edges, the edges of regions can be altered using MOVE, ROTATE, and SCALE, but grips are not displayed on regions as they are on solid subobjects. Remember, editing subobjects of a primitive removes the primitive’s history. This should always be a consideration if it is important to preserve the solid primitives that were used to construct a 3D solid model. Instead of editing the primitive subobjects at their subobject level, it may be better to add or remove material with a Boolean opera- tion, thus preserving the solid’s history. NOTE NOTE There are several ways to perform a 3D edit. Keep the following options in mind when working with subobject editing. • Selecting the MOVE, ROTATE, or SCALE command and picking a subobject will not display a gizmo, regardless of the current gizmo button displayed in the Selection panel and the Show gizmos fl yout. • Selecting the 3DMOVE, 3DROTATE, or 3DSCALE command and picking a subob- ject will display the appropriate gizmo, regardless of the current gizmo button displayed in the Selection panel and the Show gizmos fl yout. • Picking a subobject without having selected a command fi rst will display the gizmo corresponding to the current gizmo button in the Selection panel and the Show gizmos fl yout. Figure 11-21. Edge grips are rectangular and displayed in the middle of the edge.