Selecting Objects
Use the 2D Selection or 3D Selection tool on the Basic palette to select objects, which makes the objects active. The Shift key and the Alt (Windows) or Option (Macintosh) key are modifiers for selection actions. Create rectangular, lasso, or polygonal marquees around objects to select single or multiple objects. The following table describes the various selection methods.
 
Option-click (Macintosh) or Ctrl-click (Windows)
Selects multiple objects as each object is clicked.; also can be used to deselect one or more objects without affecting other selected objects.
Option-drag (Macintosh) or Ctrl-drag (Windows)
Reverses the selection status of objects inside a marquee; if objects inside the marquee are selected, this method deselects those objects
Option-marquee (Macintosh) or Alt-marquee (Windows)
Invert Selection command (on the Edit menu)
Deselects everything that is currently selected, and selects all visible objects in editable layers and classes that are not currently selected
To deselect all selected objects, click in an empty area of the drawing, or press the “x” key twice in rapid succession.

Introduction : Selecting Objects

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