To View Shadows in the Viewport
Click
View tab
Palettes panel
Visual Styles.
Find
In the top panel of the Visual Styles Manager, select a visual style.
Shadows are not displayed for Hidden, Wireframe, or Sketchy styles.
Set Shadow Display to Ground Shadow or Mapped Object Shadows.
Related Concepts
About Backgrounds and Shadows
About Output Resolution
About Using Shadows in Rendering
Related Tasks
To Generate Shadow-mapped Shadows in the Rendered Image