# What are those chat features that not well-known

Recently, SEJPM wrote about a nice feature in the chat about a chat feature;

FYI: If you write [so] in a comment or here in chat it will auto-expand to Stack Overflow. Similar rules apply for [<site-name-in-url.se>]

so you can write [so] to get a link for the Stackoverflow, or [cryptography.se] for a link to our site.

• How does it work exactly?
• Are there some other nice features like this?
• They are not just for chat, they are useful all over the site, see: [crypto.se] gives Cryptography here too :) I've created a more crypto specific page here on Cryptography Meta. – Maarten Bodewes Oct 25 '20 at 23:06