Studio offers three views of each document:
Edit mode -- This is the primary work space in Studio, where you enter and edit tags and content. The vertical editor toolbar controls basic document commands.
Browse mode -- Displays the page in the default internal browser. If you set development mappings, the page is processed by the Web server and the ColdFusion Application server. You can view, but not edit, the current page.
Design mode -- Dynamically work with page elements, such as text blocks, tables, forms, and images. Changes are reflected in the HTML code. If you don't plan to use the Design mode, you can turn it off using the Design pane in the Settings dialog box (F8).