Assuming you want to copy one or more devices in an arrangement somewhere else, select your devices, press Ctrl-C, click anywhere else and press Ctrl-V.
Still don't know what you mean exactly but you can copy paste with ctrl-c and ctrl-v or on a mac control c and v. Just highlight what you want to copy. For drums just add the notetrack with your pattern and copy paste it.
well way i do it is just crlt c to copy then crlt v to paste