The Coding toolbar
The Coding toolbar contains buttons that let you perform many standard coding operations, such as collapsing and expanding code selections, highlighting invalid code, applying and removing comments, indenting code, and inserting recently used code snippets. The Coding toolbar is visible only in Code view and appears vertically on the left side of the Document window.
You cannot undock or move the Coding toolbar, but you can hide it. For more information, see Displaying toolbars in Using Dreamweaver.
For more information about using the Coding toolbar, see Inserting code quickly with the Coding toolbar in Using Dreamweaver.