What does this icon mean? Here's a list of some icons and references to understand what they mean: Sending Sent Delivered Read Disappearing Messages Quoted Reply threads for Android Sealed Sender Media can be viewed more than one time. View-once media message View-once media message, viewed Select Set up an iPad as an independent device or unlinked device. Contact is saved to your phone's contact list. Note to Self Safety number has been marked as verified. Related articles How do I know if my message was delivered or read? Does Signal send my number to my contacts? Set and manage disappearing messages View Once Media Reply to a specific message