Extrude
Modify > Extrude
 

Description:

      The Extrude (Modify > Extrude) command is an effective way of adding new geometry to an object by essentially pulling or extending faces or edges out of the model. In edge selection mode, Extrude creates a new copy of the selected edges, and connects each new edge to the original with a face. The new edge will then be selected, allowing you to move or otherwise edit it as desired. In face selection mode, new faces are similarly created for the boundaries of the selection, allowing you to pull out the selected faces from the original object.
      You can access the Extrusion Options dialog (Modify > Extrude > ...) to toggle whether the extrusion will extrude adjacent faces together or separately.  This can also be toggled with the command Extrude Faces Together Toggle which is assignable to any key/button.


Notes:

- Extrude only works in face or edge selection mode.

- Extrude sets up the new geometry, but does not actually move the selection.  Use the manipulator to move the selection.

- Extrude Along Normals (Modify > Extrude Along Normals) is similar to Extrude, but allows you to interactively move each face along its normal.