Open Gmail
In the search bar, type `is:unread`
Press Enter
To find unread emails in a specific folder, type `in:inbox is:unread`
To find unread emails from a specific sender, type `from:sender@example.com is:unread`
To find unread emails with attachments, type `is:unread has:attachment`
To mark unread emails as a priority, use Gmail filters
To view only unread emails in the left menu, click More, then Unread if available
To search unread emails in all mail, use `in:anywhere is:unread`