Before you start the tutorials, you must set the appropriate workspace.
Workspaces are sets of commands that are grouped and organized so that you can work in a custom, task-oriented drawing environment. When you choose a workspace, only the ribbon tabs, toolbars, and secondary windows specified in that workspace are shown in the interface. To access other commands not shown in the ribbon, enter their command names on the command line.
The tutorials use the Civil 3D workspace. If you use a different workspace, some of the commands that are described may not be visible. To avoid confusion, it is recommended that you switch to the Civil 3D workspace before you begin the tutorials.