Guyssss... How do I add documents to a universe..?

Hi @TickTockLoser ! That feature’s not available yet, but andrew (Our Supreme Lord and Overseer) has mentioned in the latest update here that it’s in the works. To quote andrew (Our Supreme Lord and Overseer) (emphasis mine):

Behind-the-scenes notes:

• Letting other users collaborate on your documents is on the to-do list
• Being able to enable/disable comments on your documents is also on the to-do list
• Being able to add documents to a universe (to keep things tidy) is also on the to-do list