Fillet Edges

(3D only) Used to fillet, or round, one or more edges of a solid, projected surface, or a surface of revolution.

You can access this tool from the following:

Setting	Description
Radius	Defines the radius of the fillet.
Variable Link	Let's you use an existing variable to set the input value, defined in the Variables dialog. Note: If no variables exist, you will be alerted to create one first.
Select Tangent Edges	If on, edges that are tangentially continuous are selected and rounded in one operation. If off, only the selected edge is filleted.

Key-in: FILLET EDGES