New chat
In the top menu the top-right icon button (New Chat) starts a new chat. After clicking it the current chat is saved in history.
History
In the top menu, the second button from the right (History, a clock with an arrow) toggles the history drawer. The plain clock to its left opens the drawer for scheduled tasks and monitors instead. The history drawer lists your historical chats. The chats are ordered chronologically with the time labels "Today", "Previous 7 days", "Previous 30 days" and "Older". With nothing saved yet, the drawer says "No history items."
Message Menu
A message's icons appear when you hover over it or move the keyboard focus into it. The latest answer's menu always stays in view, dimmed until you hover over it.
Voice input
Dictate your message instead of typing it. The mic button (Voice input) sits in the chat input's bottom-left icon row, next to the attachment and screenshot buttons.