Board Thread:Support Requests - Designing Your Wiki/@comment-5745743-20180721004722/@comment-27345308-20180723000751

I'm not sure what is thumbinner but it doesn't sound like it's a rail module. is the chat module but when you use. is a selector for all rail modules that haven't been redesigned yet.

Most of these are general selectors. For recent wiki activity specifically, the selector is. For chat, it's. For trending FANDOM articles it's  (but try not to touch it).

You can find out the classes/IDs of Rail modules through your browser's developer console/Inspect Element feature.