- At the Command prompt, enter viewres. 
 
- At the Do You Want Fast Zooms? prompt, press Enter to accept the default value. 
 
- At the Enter Circle Zoom Percent prompt, do one of the following: 
- Enter a value greater than the current value to increase the smoothness. 
 
- Enter a value lower than the current value to decrease the smoothness. 
 
  
Note: You can also change this setting on the Options dialog box, Display tab: Arc and Circle Smoothness.