currently, you can only choose to mark all messages as read. I would love to see the functionality to mark a single chat/conversation as read, or unread. This way if Textra is having issues marking the message as read after I've read it (This is an extremely common bug unfortunately), or I choose to respond at a later date, I can mark it as unread after reading it to remember to respond at a later date. This would be an extremely simple function to add, and it would add a lot of missing functionality.