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Learn how to locate the Civil 3D tools that are available for a given task.
This drawing contains an existing ground surface, two corridors that intersect, a storm sewer pipe network, and property parcels.
Note:
You also can right-click a tool on the ribbon to send it to the Quick Access toolbar.
The panel expands to display additional tools. If
is displayed in the bottom bar of a ribbon panel, then additional tools are available.
Each of these tabs contains tools that are relevant to a category of tasks.
The Home tab contains commands that are commonly used to create AutoCAD and Autodesk Civil 3D objects.

The TIN Surface tab is displayed on the ribbon. This is known as a contextual tab, and it contains all the tools related to surfaces. Depending on the type of object that is selected, different tools are displayed on the contextual tab. The tools on all Autodesk Civil 3D contextual tabs are arranged in a similar series of panels:

The Corridors tab is displayed on the ribbon. When an object is selected, the appropriate object contextual tab is available on the ribbon.
The corridor is deselected, and the Home tab is active, and the contextual tab is removed.