Mark as Unread
Mark a conversation you have read as unread again, so it waits in the list with a dot until you get back to it.
Asked for through the roadmap form, the way it works in WhatsApp: a member who has read a conversation but cannot answer yet marks it as unread from its menu, and it waits in the list with a dot as a reminder.
The dot has no number and counts in no unread counter, so the counter keeps meaning new messages. Opening the conversation, or a new message in it, takes the dot away. The mark follows the member to their other devices, at once in the WebSocket version and with the next check for new messages in the free version.
It is in Better Messages 3.2, in the free and the WebSocket version, and can be turned off under Settings, Messaging, Conversation Features.