To revist this article, visit My Profile, then View saved stories. Gmail is one of the most powerful and most popular email services available, and there’s a reason why. However, many of its best features are buried in the app’s dense settings pages. You’d be forgiven for missing some of the many powerful tools that are sitting right under the surface. We’ve got some of the best ones here to save you time and help you get back to the work you need to do. Change Undo Send Time Limit By default, Gmail will wait five seconds after you hit Send to actually send your email. This gives you a moment to realize that you forgot to add an attachment and recall the email. However, five seconds isn’t very much time to catch a mistake. To make this window last a little longer, head to