Use subassembly settings to control the behavior of subassembly-related commands.
Work with subassembly settings the same way you work with other object settings in AutoCAD Civil 3D, using the Toolspace Settings tree. You can control subassembly-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 Subassembly collection to establish defaults for all subassembly-specific settings and to override the drawing ambient settings for all subassembly-related commands. Use the Commands collection in the Settings tree Subassembly collection to override subassembly-specific settings or drawing ambient settings for a specific command.
Overrides to the drawing ambient settings at the Subassembly collection level and the Subassembly Commands collection level affect only the specified level. The drawing level settings are not affected. For more information, see Understanding Civil 3D Settings.