freetypy.TT_OS2.y_subscript_y_size

TT_OS2.y_subscript_y_size

Maps to the emHeight of the font being used for a subscript. If a font has two recommended sizes for subscripts, e.g. numerics and other, the numeric sizes should be stressed. The horizontal font size specifies a font designer’s recommendation for horizontal font size of subscript characters associated with this font. If a font does not include all of the required subscript characters for an application, and the application can substitute characters by scaling the characters in a font or by substituting characters from another font, this parameter specifies the recommended horizontal EmInc for those subscript characters. For example, if the em square for a font is 2048 and y_subScript_y_size is set to 205, then the vertical size for a simulated subscript character would be 1/10th the size of the normal character.