I researched "Factory upgrade: Preview" but it appears not to work. When I hover over a factory nothing changes. I have tried quitting and reloading the game, picking up and putting back down the factory. I'm not sure if this is a bug or if you have to craft a new factory after getting this research.
Images: https://imgur.com/gallery/w08AV
Edit: You have to click the button in the top left. Not sure how I missed it.
