On Sun, Jun 20, 2010 at 10:00 PM, Dirk Peinelt <dirk.peinelt@t-online.de> wrote:

is it possible to get a height-point with a “P”-prefix? (pit)

You just need to add following to your layout: code mpost verbatimtex \def\thheightpos{C}\def\thheightneg{P} etex and use "point 0 0 height -value [+10 m]" or "point 0 0 height -value [-85 m]" in your data to get C10 or P85. Martin