Use the left rail to move between AInbox, Activity, DMs, Channels, Files, Threads, Meetings, and Bookmarks. If the window is too narrow to show the rail, click the current view name at the top of the conversation list to open the same destinations in a menu.
Use the unread button at the top of the list to show only unread conversations. DMs display the number of unread messages, while channels display the number of unread messages that mention you.
Option+Click a conversation on Mac, or Alt+Click on Windows and Linux, to quickly toggle it between read and unread.
Select a chat to open it beside the conversation list. On a wide window, opening a reply thread adds a third panel so you can read the thread and its original conversation together.
Drag a divider to resize the panels. Double-click a divider to automatically size the panels for the current window.
Your position in a conversation is remembered when you switch between chats. Use the Back and Forward buttons to revisit AInbox destinations, or swipe left and right with two fingers on a trackpad.