VMS Help MACRO, VAX MACRO Assembler, Directives, .EVEN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Ensures that the current value of the location  counter  is  even
    by adding  1  if  the  current  value  is  odd.  If the current
    value is already even, no action is taken.

      .EVEN