How do I view a thread in Announcements Redesign as an instructor?
Announcements Redesign supports threaded replies to announcements when replies are enabled. You can view threaded replies in the Thread sidebar.
When responding to a user in a thread, you can quote a threaded reply.
Open Announcements

In Course Navigation, click the Announcements link.
Open Announcement

Click the name of the announcement.
View Threaded Replies
If course users have replied to an announcement reply, you can view the reply thread by clicking # of replies link [1].
The Thread sidebar displays threaded replies [2] including the name of the user who posted the reply [3] and the date and time the reply was posted [4].
Quote Threaded Reply

To reply to a thread, click the Reply link [1].
To create a reply that includes quoted text from a threaded reply, click the reply's Quote link [2].
Post a Message

To enter your reply, links, photos, equations, and/or media, or @mention course users, use the Rich Content Editor [1].
If you chose to quote a threaded reply, the Include quoted reply in message toggle displays and is enabled by default [2]. To exclude quoted text from your response, disable quoting by deselecting the Include quoted reply in message toggle.
To post your reply, click the Reply button [3].