How do I change the ingredient of an input? Or to an output?

I want to reroute some things but it doesn’t seem like it is possible to change which ingredient is coming in an input. Also I don’t seem to be able to change an input to an output. Is this a constraint or am I missing something?

Got it. I had to zoom in REALLY CLOSE in order to get the input to be clickable so it shows the ‘Stop’ button.

I recently downloaded the newest patch for Big Pharma and was disappointed to see that machines could no longer be put up against one another. Personally I really enjoyed using this to conserve space in some of my production lines.

Ah, I’m afraid that was just a bug when I first released the game into beta. It was never my intent that the player is able to butt machines directly against each other.