In the initial planning of your corridor, examine the assemblies you are using and identify the major points and links that will need special labels or display styles for higher visibility in the design. For example, you may need to show ditch side slopes or elevations along the gutter flow line. For purposes of three-dimensional display, you may want to color the paved surfaces black and the ditches green. These controls are all available in code set styles. You can find Code Set Styles in Toolspace, on the Settings tab, by expanding General collection 
Multipurpose Styles.