You can change the default style and name format settings for sections. Settings are handled in a standard way throughout Autodesk Civil 3D via the Settings tree at three levels: drawing, feature, and command.
To establish default settings for all sections, in the Settings tree, right-click the Section collection.
The default styles and name format settings for sections are described in this topic. Drawing ambient settings are described in Ambient Settings Tab (Drawing Settings Dialog Box).
In the Edit Feature Settings - Section dialog box, note that appears next to the settings for default styles and the default name format, marking them as specific to sections.