WordPress allows for fullscreen composing. It provides for complete distraction free editing of your Page or Post. To enter fullscreen mode simply click on the Distraction Free Writing button (). With the Distraction Free Writing button turned on, the left-hand menu and the right-hand side panels fade out of view, leaving the screen with just the minimal required to compose your content.
In Distraction Free Writing mode, only the Title field and Visual Editor is displayed until you move your cursor outside of the editor. Once you move your cursor outside of the editor, the menu and side panels fade back into view.
To exit from Distraction Free Writing mode, click on the Distraction Free Writing button again.