PyCad Point in Surface

Gmsh has a feature where you can add a point to the interior of a surface and force it for meshing, like this:

Point{1} In Surface {210};

The advantage is that I can locally refine my mesh. I can't find the option for this in the user guide. Does it exist?

Here is a bit more information: http://onelab.info/pipermail/gmsh/2008/003553.html (starting off with a question by myself 13 years ago :-D )