Flags mark messages for follow-up and sync across all mail clients.
Press K to toggle the default flag on the selected message. Press K again to clear it. A screen reader announces the result: “Flagged: Urgent.” or “Unflagged.”
In Conversations, From, or To view, pressing K on a group row flags every message in the group.
Press Ctrl+Shift+K to open the flag picker. Arrow to a flag and press Enter to apply it. A Clear flag option at the bottom removes the current flag.
Open the Flag Manager from the command palette (Ctrl+Shift+P → Manage Flags). You can create up to 20 named flags, each with an optional color. Use Set as K default to make any flag the one that K applies.
Open the View menu or the filter combo box and choose Flagged to see only flagged messages in the current folder.
The All Flagged Mail virtual folder in the folder tree aggregates flagged messages across all accounts.
The flag name is announced before the read status when you navigate to a flagged message — for example, “Urgent. Unread. Kelly Ford. Budget deadline.” This makes it immediately clear a message needs attention. You can turn this off in Settings → General → Accessibility → Announce flag status.