How do I select a specific type of metal I have selected to output?
I pretty much smelted everything I had when I built my first one, but I need some copper but I have like 300 iron at bottom and it just outputs that when I want to output my copper..
I tried clicking copper with both buttons, dragging and such but its a static display on my smelting tank thing. Not sure how to do it!
You can't. Smeltery metals are ordered like a FORTH stack; whatever you put in first, ends up at the bottom. My advice would be to make multiple smelteries.