Before you can highlight, assign, unassign, configure, or otherwise manipulate an object, you must first select it by clicking it.
From the Hierarchy window, you can also select groups of objects. The procedure for selecting more than one object in the Tools window depends on which tool you are using. See the documentation for your tool.
To select a group of objects in the Hierarchy window:
To select consecutive objects, click the first object, press and hold down SHIFT, and then click the last object.
To select objects that are not consecutive, press and hold down CTRL, and then click each object.
To unselect specific selected objects:
To unselect one or more consecutive objects, press and hold down SHIFT, and then click the last object to include in the selection. The objects below it are unselected.
To unselect objects that are not consecutive, press and hold down CTRL, and then click each object to unselect.
To unselect all selected objects:
Click on a clear spot in either the Hierarchy or Tools window.