Is there any method can convert all path into Quadratic in the same time without exporting to ttf?
I fixed it. But I would recommend to keep Cubic curves. They are easier to edit and quadratics are not 100% supported, yet.
Or is there a reason you need this?
Thanks! But my company use to designing with TT curevs, and now we are still testing.
I recommend designing in cubic curves. Glyphs can convert to TrueType on export.