I figured out Lemmy/Kbin/Mbin crossposting. Just post the same URL as another post and they become crossposts of each other. Huzzah! I was watching the sea lions at the zoo today playing around underwater and I think they're my new favorite animal.
This also means that different people who post the same thing to different communities have their posts show up as "linked" allowing people to find all the places people are talking about something.
It mostly works with youtube videos and articles though. With images you have to make sure to use the same image link.
