Factorio Forums

Even when all the auto stacks are disabled (options, stacks on inventory, item group, subgroup) if you separate let say coal in 5 stacks of 20 and you ctrl+click inside anything they will all merge inmediately.
How can it be disabled?

If you're trying to put a specific amount of coal (or whatever) into something and are separating it out into appropriately sized stacks in your own inventory first, try shift-clicking one of those stacks instead of ctrl-clicking. That should transfer only the stack you click.

yeah to transfer a specific complete stack or to transfer half a stack you can just ctrl click and trasfer.
Try this, place in your toolbelt 4 stacks of 20 bullets (or 4 stacks of anything as long as they are not full stacks) ctrl click to transfer half or all the bullets into a machinegun, suddenly all the bullets stack together in your active stack.
Its kind of annoying when starting the game that i want to place only 10 bullets on a machinegun or 2/3 coals per machine and that happens.