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Add Switches to the Add method: selected objects can be added to the selection
set by using any of the object selection methods. Auto and Add are the default
methods.
Remove Switches to the Remove method: objects can be removed from the
current selection set using any object selection method. An alternative to
Remove mode is to hold down Shift while selecting single objects or use the
Automatic option.
Multiple Selects objects individually without highlighting them during object
selection. This speeds up object selection for highly complex objects.
Previous Selects the most recent selection set. The Previous selection set is
cleared by operations that delete objects from the drawing.
NOTE The Previous selection set is ignored if you switch spaces.
Undo Cancels the selection of the object most recently added to the selection
set.
Auto Switches to automatic selection: pointing to an object selects the object.
Pointing to a blank area inside or outside an object forms the first corner of
a box defined by the Box method. Auto and Add are the default methods.
Single Switches to the Single method: selects the first object or set of objects
designated rather than continuing to prompt for further selections.
Subobject Allows you to select original individual forms that are part of
composite solids or vertices, edges, and faces on 3D solids. You can select one
of these subobjects, or create a selection set of more than one subobject. Your
selection set can include more than one type of subobject.
Pressing and holding the Ctrl key is the same as selecting the SELECT
command’s Subobject option.
1724 | Chapter 19 S Commands