Hello i am new here So while i was playing i was trying to queue build stuff with my fabbers by pressing shift and clicking but all that did was show a blinking line between the fabber and the object
If you've already queued objects, later selecting the fabber and pressing Shift will display what you've queued so far and the order of the queue. You can still queue more objects to add to the list.
Yes, you do use Shift to build queues. And if fabbers are still building after you've left them and returned, you can use Shift to see what remains in their queue and add more items.