How do I delete email from trash? How do I delete email as a group rather then one by one?

[Windows Central Question]

how do I delete email from trash? How do I delete email as a group rather then one by one?

Have gmail. Since I got windows 10, I am trying to delete unwanted email. How do I delete as a group all unread emails, and how do I delete the entire group of trash? I only see how to do this on a one by one basis. Help!