I've reported this a few times.
On https://www.accordan...atures/#Stacks*Dr. J. mentioned on minute 1:12 to 1:13 the source will also be copied and pasted. But this is still not the case. It works with drag and drop. But Drag and drop works in my opinion not well. It is much easier to click where I want the content in Papers and paste it, than to drag in to the right place.
Thanks for adding this feature otherwise for me Stacks and Papers are still useless, because I don't use it.
Edited by Fabian, 01 February 2020 - 06:24 PM.