C-c b SPC ... yahtml-insert-begend
C-c b a ... a href or a name
C-c b b ... body
C-c b c ... center
C-c b d ... dl
C-c b f ... form
C-c b H ... head
C-c b h ... html
C-c b s ... select
C-c b T ... table
C-c b t ... title
C-c b u ... ul
C-c b 1 ... h1
C-c b 2 ... h2
C-c b 3 ... h3