Switch between Classic, Chat, and List Inbox
Choose a mail layout and use the compact conversation composer in Chat.
Choose the Inbox view
- Open Settings → Appearance → Inbox view theme.
- Choose Classic (default split-pane reader), Chat (conversation bubbles), or List (opens a message in its own reader view).
- Wait for the saved setting and reopen Inbox. The choice survives restart.
This is separate from Office/Classic app navigation and Light/Dark color mode. It does not create a new mail account or convert email into an instant-messaging service.

Read a conversation
Select an account/folder and a conversation. Incoming and sent cached messages appear as bubbles, with message details and supported attachment preview/download controls. Thread grouping reflects the mail already downloaded; use Mail history sync for older messages. All three views share folders, labels, account scope, search, and safety actions.
Use the compact reply box
The default message field is small like a chat box; use its enlarge/restore control when you need more room. Expand the upward-arrow details control for From, To, Subject, and Cc/Bcc. Right-click selected text for rich-text formatting rather than requiring a permanent large toolbar.
Template, Signature, and Send options open upward. Add files, choose a template/signature, or use Write with AI when enabled. Review the sending account, recipient, subject, and reply mode before Send. A chat bubble is still an email sent through SMTP and subject to normal limits.
Keep ordinary email safeguards
Recipient signature rules, unsubscribe status checks, external-link confirmation, and attachment/security results still apply. A compact view does not make an external link or attachment safe. Switch back to Classic at any time without deleting cached mail.