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 Toggle fullscreen mode button (). The editor will then takeover the whole browser window.
At the top of the screen is a toolbar with only the minimal number of buttons to enhance the distraction free environment. The toolbar and editor borders are displayed when first entering fullscreen mode. After a few seconds, these fade leaving you with a clean and clutter free editor where you can concentrate on updating your content.
To view the menu toolbar again once they have faded simply move your cursor up towards the top of the screen and they will be displayed again.
To exit from fullscreen mode and return to the standard visual editor, click on the Exit fullscreen link at the top of the page.