Selects the object. Menu choices are dynamically enabled or disabled on the set of objects you select.
Selects all objects between two selected objects, or changes the range of a selection set.
Selects multiple noncontiguous objects by clicking each object you want to select, or deselects an object without affecting other selected objects.
Invokes the default action for an object. This action usually edits an object or, for a directory, opens the directory in theWork pane.
Additionally, this action starts a Properties dialog box and displays properties for the selected object.