I am a bit confused as to how the “Preview Ascender” custom parameter is supposed to work. I am trying to get rid of the excessive spacing above the letters (see marked rectangle), so that they vertically fill the preview bar without wasting space. I set the Preview Ascender to just a little above the ascender value but the white space remains. Am I missing something?
It was applying a 25% padding. I changed it that it will apply the extra spacing only to the default spacing and will use the preview settings as is.