The Dashboard is the WordPress CMS User Interface
The idea is to make site updates and content management as easy as possible
Like “Windows” does for your PC, it offers icons and a point -and-click interface to edit and control your website
The third icon down from the top is a Push-Pin for Posts, which in turn brings up a dropdown submenu of related options just to the right of the selected icon. In this example, that would be: Posts, All Posts, Add New, Categories, Tags, Copy a Post
In the Edit mode, if you want to view the underlying HTML code for a page or post, you still can, via the “text” tab as opposed to the normal “visual” tab.