The Curtain Wall is a system, which is made up of components like Scheme, Frames, Panels etc.
You will normally see the Favorite for the whole system.
But if you open a Curtain Wall in 3D for editing, you will see the Favorites for the various components.
After opening the Curtain Wall for editing you may have to activate the Scheme Tool for the Scheme Favorite to appear of the Favorites Palette.
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