While the ribbon is the primary access point for AutoCAD Civil 3D commands, many commands are also available from the application menu and from context menus that are displayed when you right-click an object in Toolspace or in the drawing window.
Application Menu
The application menu provides access to file-related commands. For example, it provides commands that let you create, open, print, export, and publish a file.
Access the application menu by clicking the application menu icon at the top left of the application window 
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The application menu also provides a search tool which you can use to search for commands. Only those commands that are available in the current workspace are shown and searched.
Context Menus
Context menus are available throughout AutoCAD Civil 3D. To display a context menu, right-click your pointing device on items in the Toolspace, Panorama, or other window, or on objects in the drawing area.
Legacy Menu Bar
The menu bar is no longer displayed across the top of the AutoCAD Civil 3D 2018 program window by default. You can display the menu bar by clicking the drop-down arrow on the Quick Access toolbar and selecting Show Menu Bar, or by entering menubar at the command line and then entering 1.