[texhax] How can I insert a vertical spacing relative to upper page limit?

[Philip TAYLOR]

Robin Fairbairns wrote:

 >>>use \vspace*
 >>
 >>Works perfectly, thanks! If anyone feels like explaining to me why and how
 >>the star does the trick I would really appreciate it.
 >
 > why: because that's what it's documented to do.

'When I use a star,' Humpty Dumpty said, in a rather scornful tone,'
  it means just what I choose it to mean, neither more nor less.'

** Phil.