Sao ky qua, khi dung vi tinh o hang thi co the chon mode on/off de viet chu vietnam nhung khi dung vi tinh o nha thi khong thay mode do nua. tai sao vay?

Co ai biet xin chi giup? cam on


It is so odd! when I use my computer at work, I could see the option mode on the top to turn on/off for writing vietnamese.

But when I use my computer at home, I can't see that mode anywhere. So I can't write vietnamese with accent mark.

Does anyone know why? please help me? I want to write vietnamese with accent mark at home.

Thank you for your help in advance.