Twitter Update Lets You Populate br Old Threads With New Tweets The update is called "continue thread,"br and it is available on Twitter's iOS app. Only some users have br access for now, and Twitter has not br revealed when everyone will get it. To use "continue thread," br a composition window becomes br available when you write out a new tweet. This window lets you see br old tweets and threads, allowing you to pick which one br to link with the new message. In the older tweet, "continue thread" br is an option in the three dots menu. Once clicked, your br latest tweet merges br with the past thread.