Just uncheck the "placemark" (in Temporary Places or in My Places if you already placed it here ).

It is the same for all placemarks/overlays/polygons
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Google Earth addict and Concorde lover -------------------------------------- Please turn on Community Layers and search the forum BEFORE posting a placemark to avoid posting duplicate placemarks All placemarks for Concorde are HERE! please check this thread BEFORE adding a placemark about this wonderfull plane