Save Your Chatter Posts as Drafts
Where: This feature is available in Lightning Experience in Contact Manager, Group, Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.
Why: As you type a new post, Chatter saves your work to the My Drafts tab. Add files, links, images, mentions, hashtags, and any other rich text, because we save it all.
You can access your drafts in My Drafts to publish, edit, or delete them.
When you save a post with a hashtag, the corresponding topic is not created until the post is published.
How: To turn on Draft Posts in your org, navigate to the Chatter setup menu. Under the Draft Posts section, select Allow draft posts.