Tone marks on nasal syllabic=[Kói ngièn-sṳ́-mâ]
The tone mark usually falls on the vowels, but in Hakka there exists the nasal syllabics m and ng, which can be pronounced in different tones. I am using WinXP and the installed East Asian input language Vietnamese.
Firstly type out the syllable ng, follow it with a vowel letter, add the tone mark, use the arrow keys to move back one place, use the backspace to delete the vowel, and the tone mark stays, eg. ngi, ngì, ng̀. Dylwhs 08:38, 31 Ńg-ngie̍t 2007 (UTC)