The new shortcuts were revealed in a series of tweets by Twitter app developer Amro Mousa yesterday. Mousa let it be known that holding down the Command key brings up a shortcut sheet on connected devices running iOS 9 or later.
Holding down the key shows shortcuts for a new tweet (Command+N), move left one tab (Shift+Command+[), and move right one tab (Shift+Command+]), but there are others available, as Mousa later highlighted.
@amdev CMD+R to reply in tweet details or a DM conversation. And CMD+Enter to send. 😋— Amro Mousa (@amdev) August 2, 2016
The additional shortcuts are for closing a tweet dialog (Command+W), replying in tweet details or a DM conversation (Command+R), sending a tweet (Command+Enter), and another way of cycling through Home, Notifications, Moments, Messages, and Me screens in the app (Command+1 through 5).
Twitter can be downloaded from the iOS App Store for free. [Direct Link]