If you are working on a post, but are not yet ready to publish it, you can save it as a draft to come back to it later and finish editing. 

To do this, select the Save as Draft button in either the Create New Topic or the Answer composition screen. 

You will see unpublished drafts of new topics in the left-hand list under the header Draft.

Draft answers are indicated by the word draft next to the author’s name and are only visible to the author until published. 

Edit your post and select Publish to remove the draft status and make your post visible to others viewing the tool.