AutoCAD 2008 User's Guide > Work with 3D Models > Create Sections and 2D Drawings from 3D Models > Work with Section Objects > Change Section Object Properties > 
Change Section Object Properties
Concept Procedure Quick Reference
 
 
 

To change the transparency and color of the section plane indicator

  1. Right-click the section object. Click Properties.
  2. Under Section Object, enter a value from 1 - 100 for Plane Transparency. Setting it to 1 makes the section plane indicator opaque.
  3. Select a color for Plane Color.

    The section plane indicator is updated in the viewport.