include in their GPOS table:
| OS Version | Combining Macron Below Support | |------------|-------------------------------| | Windows XP | Poor – manual positioning often wrong | | Windows 7 | Improved but font-dependent | | Windows 8+ | Good, but requires OpenType mark anchors | | Windows 10/11 | Excellent (if font supports it) | twi font for pc
lookup MarkToBase markClass [uni0331] <anchor @bottom_center>; baseClass [a e ɛ ɔ A E Ɛ Ɔ] <anchor @bottom_center>; include in their GPOS table: | OS Version