2012

If you move, rotate, or scale a face on a 3D solid primitive, the solid primitive’s
history is removed. The solid is no longer a true primitive and cannot be
manipulated using grips or the Properties palette.
Face Modification Options
As you drag a face, press Ctrl to cycle through modification options.
■ Extend Adjacent Faces. When you move or rotate a face without pressing
Ctrl, the shape and size of the face is maintained. However, the planes of
adjacent faces might change.
■ Move Face.When you move a face and press and release Ctrl once while
dragging, the position of the face is modified within the boundary, or
footprint, of the adjacent faces.
■ Allow Triangulation.When you move or rotate a face and press and release
Ctrl twice while dragging, the size and shape of the face is maintained.
(This behavior is the same as if you had not pressed Ctrl). However, the
adjacent planar faces are triangulated (divided into two or more planar
triangular faces), if necessary.
If you press and release Ctrl a third time, the modification returns to the first
option, as if you had not pressed Ctrl.
1190 | Chapter 25 Modify 3D Models