If you’re the type who relies on control-Z, Google has good news for you. After years of toying with an Undo Send feature, it’s now officially a Gmail feature. You can now give yourself between five and 30 seconds to take back a message. Think of it as a self-censor with just enough time to make sure attendees don’t get the wrong message (or read your real, stressed-out thoughts). It also saves some embarrassment if you forget to include an attachment or CC the wrong person. Happy Undo Sending! Click here for how to enable the feature.