In the Mel Commands box at the bottom of the screen type:
select -r shapename.vtx [VertexNumer(s) ]
Then hit enter.
All the text in blue needs to be replaced with the appropriate data.
If you want to select more than one vert. simply separate each vertNumber with ( : ) with no brackets.
www.stevenegan-cgi.com
"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"