With CTRL+C objects can be copied into the clipboard. This can be single objects or combined objects even those ones of different types. With CTRL+V the copied objects will be placed next to the original objects in a distance of 1m in X and 1m in Y direction. With the keyboard shortcut CTRL+H the object in the clipboard will be pasted next to the position of the mouse, taking into snap of any snap grid nearby. To copy luminaires into a ceiling grid just place the first fixture. Than move the mouse to the ceiling panels you need a luminaire in and press the CTRL+H keys. The luminaire is pasted and (if the mouse was close enough) the grid snap takes the luminaire in the correct position.
