R - Commands   
RADIAL (command)
   Overview   Operations  Commands 

It constrains the movement of the cursor at specified intervals

 Status bar:

 Snap toolbar: 

  Menu : Tools  Snaps  Radial Snap

 Command line: RADIAL

Specify spacing for radial snap or [ON/OFF] <10.0000>

Using the Status bar or Menu command the status of  RADIAL is automatically inverted.

It Enables/Disables RADIAL SNAP or else it specifies the set interval of snap.

The Radial Snap constrains the movement of the cursor at specified intervals along a polar angle.