Guild Wars 2

When will we see a selective division and addition to stacks of stackable items? I can’t select to add or subtract a number of items from one pile to another. I want from time to time to choose how many items I want to give to another player or how many items I want to sell either on the trading post or a vendor.

Well you already can split stacks with ALT and those splitted stacks stay splitted at a vendor. Ok, they auto-merge at the trading post, but there you can choose how many you want to sell.

I do this every time to split like 4 identical sigills into 4 single sigills to throw them in the forge.

No one told me that I had that option. Thanks!
They should put this somewhere in the game, like the suggestions section.