Samsung Galaxy S3: How to View Only Unread Messages in the Gmail App

Mark as unread is one of the option available in the Gmail app. This option will allow you to mark the selected email message as unread, so you will be much more easier when you want to do something with them later, such as replying or forwarding an email message. This is certainly will useful to avoid the email message lost in hundred of your email messages, especially if you're the one who