I want to use the Elevation Label 20, but I am only given the option to use the Project Zero or Story Level as reference height. I would like to use a custom height to measure to. I tried to fin in the object script where could I input the other level, or make a custom arithmetics (+0,15), but I couldn't. Any body can give me a hint in this custom object modification?
I need to admit right away that although I have experience in JavaScript, PHP and Python, I have zero experience in ArchiCAD (?GDL). So, please ... what/where is this macro you said?