Bevel
Modify > Bevel
 

Description:

      The Bevel (Modify > Bevel) tool is used for creating a bevel along selected edges or the edges of selected faces. It is akin to slicing off the corner where two faces meet, revealing a new face and two edges where one used to be. The bevel amount can be controlled interactively using the manipulator (or dragging anywhere on the screen while the tool manipulator is active). Pressing Enter or right-clicking will complete the bevel and exit the tool. The bevel is applied to edges, but can be used in either edge or face selection mode.


Notes:

-On a subdivided object, bevels can be used to sharpen edges and corners, because it creates geometry which is close together.  You can see the result interactively by adjusting the bevel amount while the shape is subdivided.