Hover over the message or the file and click Start a thread .

After you create the thread, you or anyone else in the space can add a reply to that thread, click Reply .

After you or anyone else replies to a thread you can collapse the thread, click Collapse.

When somebody replies to a thread, you'll see a notification in the space to highlight the new replies.

Long press the message and choose Start a Thread.

A new thread window opens.

After you create the thread, you or anyone else in the space can add a reply to that thread, touch and hold the message and choose Reply.

You can swipe right on a selected message on your iOS devce, to quickly start or respond to a message thread.

Hover over the message or the file and click Start a thread.

After you create the thread, you or anyone else in the space can add a reply to that thread, click .