Use surface settings to specify the default behavior for surface-related commands.
Settings are handled in a standard way throughout AutoCAD Civil 3D. You access settings using the Settings tree. You can control settings at three levels: the drawing level, the object collection (feature) level, and the command level. It is important that you understand how the different levels of settings work together. For more information, see About Settings.
You can use the Settings tree Surface collection context menu to establish defaults for all surface-related commands. You can change surface-specific settings at this level, or you can override the drawing ambient settings.
Use the Commands collection under the Surface collection to change surface settings for a specific command. You can change surface-specific settings at this level, or you can override the drawing ambient settings.
For information about the drawing ambient settings that you can change at the surface collection level and the surface command level, see To Specify Ambient Settings.