Is there a way to sell all of a stack or buy a whole stack?

That is what I am doing most of the time and I can't figure out how to sell or buy a whole stack. All I know how to do is click them one at a time.

There seems to be a V and Z commands for x10 and x100, but I have not figured out how to use them. They don't seem to do anything.

Without bulk selling or buying, I spend most of my time clicking supplies in this game.