To virtually merge one vertex adjacent to an edge with the other adjacent vertex, in the Geometry toolbar, from the 
Virtual Operations menu (

), select 
Merge Vertices (

). Then enter the properties of the operation using the following sections:
 
    Select the vertex that you want to keep in the Graphics window. It then appears in the 
Vertex to keep list.
 
    Click the Active button to toggle between turning ON and OFF the 
Vertex to keep selections.
 
    Select the vertex that you want to remove in the Graphics window. It then appears in the 
Vertex to remove list. Click the 
Active button to toggle between turning ON and OFF the 
Vertex to remove selections.