Starsector 0.97a is out! (02/02/24); New blog post: Simulator Enhancements (03/13/24)
It depends on the view how large the stacks are. on the resources tab it'll be all a single stack.Another way to make it all one stack is to put it all into storage, confirm, then click the stack and pull it out all at once.
(FWIW, stack size in player cargo will be unlimited in 0.9.1a.)
I cant be blamed for what I said 5 minutes ago. I was a different person back then