im trying to match my layouts in Archicad and Indesign and I was wondering what method Archicad uses to calculate the Line Spacing in text elements. The value is specified as a percentage in the options menu and is 100% by default. But 100% of what? I know that when I am changing the text size in Archicad I am changing the cap height of the text not the cone height as I am doing in Indesign. Is the Percentage also calculated from the cap height?
My main question is, if I am setting the Text Size for example to 1,5 millimeter what is the amount of Line Spacing in millimeters (or Points / pt) when line spacing is set to 100%?