Twitter explores 'undo send' button for paying users SECTIONS Last Updated: Mar 05, 2021, 09:16 PM IST Share Synopsis App researcher Jane Manchun Wong tweeted an animation showing a tweet with a spelling error where a Twitter 'undo' button was available before a short timer ran out. AP A Twitter spokeswoman said the feature was being tested as part of the company's exploration of how subscriptions could work on the platform. Twitter Inc. is testing an "undo send" function that would give users a short time to withdraw a tweet before it is posted, the company confirmed on Friday. App researcher Jane Manchun Wong, who discovers unannounced social media features by looking at the sites' code, tweeted an animation showing a tweet with a spelling error where a Twitter 'undo' button was available before a short timer ran out.