Show Selection/Marquee in 3D

Right-click to access the Show Selection/Marquee in 3D command; or
Use View > Elements in 3D View > Show Selection/Marquee in 3D
Show Selection/Marquee in 3D also works if you are already in the 3D Window and make an explicit selection there, then execute the Show Selection command. The caption of the 3D Window will include the “Selection” mention and the name of the Home Story of the selected element(s).
Right-click to access the Show Stored Selection in 3D command; or
Use View > Elements in 3D View > Show Stored Selection in 3D
To change this, use the Marquee Effect controls in View > Elements in 3D View > Filter and Cut Elements in 3D.