Use assembly settings to control the behavior of assembly-related commands.
Work with assembly settings the same way you work with other object settings in AutoCAD Civil 3D, using the Toolspace Settings tree. You can control assembly-related settings at both the object collection (feature) level and at the command level. For information about how the levels of settings work together, see Specifying Drawing Settings.
Right-click the Settings tree Assemblies collection to establish defaults for all assembly-specific settings and to override the drawing ambient settings for all assembly-related commands. Use the Commands collection in the Settings tree Assembly collection to override assembly-specific settings or drawing ambient settings for a specific command.
Overrides to the drawing ambient settings at the Assemblies collection level and the Assembly Commands collection level affect only the specified level. The drawing level settings are not affected. For more information, see Understanding Civil 3D Settings.