When
you select an item in your document window, you can quickly locate
the corresponding item in the Layers panel using the Locate Object
command. This command is especially helpful for locating items in
collapsed layers.
Select an object in the document window. If you
select more than one object, the frontmost object in the stacking
order will be located.
Choose Locate Object from the Layers panel menu. This
command changes to Locate Layer if the Show Layers Only panel option
is selected.