Twitter just made its biggest change since it launched more than a decade ago.
It has doubled the maximum length of tweets, up to 280 characters from 140 — but not everyone can use the new feature just yet.
For now, it's being tested with a small subsection of Twitter users, before a potential roll-out to the rest of the user base in the coming weeks.But Twitter users have noticed that with a small tweak, it's easy for anyone to activate 280-character tweets right now.