Found on the Vertex tab of the MODO Tools toolbar, Extrude Vertex shifts the selected vertex along its normal, away from its original position and creates three additional vertices and edges around the original vertex location.
Settings include:
Extrude: This distance value determines how far out the vertex is shifted away from its original location.
Width: This distance value determines how far the newly created edges that surround the original vertex are pushed out away from that location.
Use Material: Determines what material group to assign the newly created geometry. If this is disabled, the new polygons will not have a material group and will use the base material.
