Hi Eduardo Trápani, The fill issue is one that must be handled. Unfortunately, I do not think any of the standard font formats can handle 2 color fonts properly. There is no straight forward and correct way to do this. You may want to make a separate font specifically for the fill components. Maybe Graphite or some other font engine could combine 2 fonts when visualizing the characters. I know 2 color fonts are an issue for another script beside SignWriting but I can't remember the name. Maybe something has been accomplished or planned? Regards, -Steve