From the general context menu select Toggle Hidden. The magic wand cursor appears, and any hidden objects appear faintly in the drawing window and when your wand cursor is nearby or on top of an object, the object will highlight in green. The displayed item will highlight in orange when the wand is nearby or on top of the object.
Click faint items to display them. Click any displayed items to hide them. When you are finished toggling, click the select arrow 
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