Accents vs. Vowels
Dấu với nguyên âm
Telex Input Method
Cách gõ Telex
VNI Input Method
Cách gõ VNI
VIQR Input Method
Cách gõ VIQR
a circumflex - â aa a6 a^
e circumflex - ê ee e6 e^
o circumflex  - ô oo o6 o^
a breve - ă aw a8 a(
o horn - ơ ow o7 o+
u horn - ư uw u7 u+
d stroke - đ dd d9 dd
acute - sắc s 1 '
grave - huyền f 2 `
dot below - nặng j 5 .
hook above - hỏi r 3 ?
tilde - ngã x 4 ~
remove diacritics - xóa dấu z 0 -
Example - Ví dụ:
Vietnamese - Tiếng Việt
Vis duj:
Tieesng Vieejt
Vi1 du5:
Tie61ng Vie65t
Vi' du.:
Tie^'ng Vie^.t

The keys designated as diacritical marks are to be typed immediately after the vowel they qualify. To type those keys literally, i.e., without combining them with the preceding vowel, type the escape character, defined to be the back slash key (\), right before entering those keys. For example, while Viet Mode is on with VNI Input Method selected, if you want to type the character sequence a1, enter a\1 — the escape character (\) will prevent character a and character 1 from combining into character á.

Most Vietnamese keyboard drivers also support some sort of smart input, which allows entry of diacritical marks at the end of the word. The driver, through some intelligent algorithm, will place the marks on the appropriate characters within the word. This automatic marking results in faster typing for users.