How do I remove the author from an article?

By default, the author field on new articles is filled with the name of the person that created the article. This name is displayed near the top of the article:

The first way to prevent it from being displayed is to open the folder document (long click on the folder name in the left side of the app) and set the "Hide author on display" flag:

The second way to prevent the author from appearing is to remove the author from the article. To do this, edit the article and select the "Author" field. The names of the people authorized to create articles will be listed. Scroll to the top of the list until the current name is blank and then click "Set".

You will also have to delete the free form author name from the next field:

Now save the article. The article will no longer have an author on it.