Zachary C. answered 02/28/20
Revit Tutor with a focus on real-world applications
When you want to copy and paste a wall hosted item, use the typical CTRL/CMD+C and CRTL/CMD+V shortcut.
When the item is pasted, you will see a light gray "ghosted" wall. Align this wall with the wall you want the new family to be located. Then left click off the element.
This method doesn't always work, it usually depends on the element you are trying to copy and paste, but occasionally it does.
Also, if you right click and "Create Similar", this is quick shortcut to creating the same element