How to do it...

Let's create a new text format with a custom CKEditor WYSIWYG configuration:

1. Visit Configuration from the administrative toolbar and head to Text formats and editors under the CONTENT AUTHORING heading.
2. Click on Add text format to begin creating the new text format:

1. Enter a name for the text format, such as editor format.
2. Select which roles have access to this format--this allows you to have granular control over what users can use when authoring content.
3. Select CKEditor from the Text editor select list. The configuration form for CKEditor will then be loaded.
4. You may now use an in-place editor to drag buttons onto the provided toolbar to configure your CKEditor toolbar:
   
5. Select any of the Enabled filters you would like, except for Display any HTML as Plain text. That would be counter-intuitive to using a WYSIWYG editor!
6. When satisfied, click on Save Configuration to save your configuration and create the text filter.