About Handles
Handles are graphical objects that you use to manipulate data in the graphics window. You can snap handles to existing geometric references or to user-defined grid increments. Changes to the geometry are displayed dynamically in the graphics window.
You can move a drag handle along a 2D or 3D trajectory.
Duplicating a Handle
In the Round, Draft, Extend, Offset Curve, and Datum Point feature-creation and Datum Point Offset Csys tools, you can widen your ability to manipulate geometry by duplicating a handle. By duplicating the handle, you change the feature type from constant to variable or another radius or point is added.
You can change the handle behavior by moving the dragger and pressing SHIFT or CTRL.
SHIFT—Activates the Snap mechanism, if available.
CTRL—Activates the Duplicate mechanism, if available.