Tap the "Settings" icon and scroll down and tap "Messages." The iPhone 7, 8 and X have a list of features ... recipient or add them using the + icon locating recipients via your contacts.

Learning how to orgainize your iPhone text messages is an absolute game-changer. As our devices fill up with conversations, important texts often get buried under junk messages, verification codes ...

go to Settings > General > iPhone Storage > Messages. If you haven’t cleared up unnecessary attachments in a long time, you could be staring at more than 50GB of iMessage attachments.