Google has supported Vietnamese virtual keyboard for Gmail
A great feature to help you type Vietnamese in the Gmail editor without having to install accent programs like Vietkey, Unikey, this helps when you use a computer without a typing program.
Virtual keyboard feature is available in Gmail since 2009 but it is only now supported in Vietnamese.

First login to your Gmail account, click on the Settings wheel icon (this article illustrates the Vietnamese language, the steps in the English language are similar).
At the General tab, click on Enable input tool - Use IME, transliteration or virtual keyboard to enter the language you choose

At this time, the Input Tools panel will appear, drag down the scroll bar and find the virtual keyboard you want to use when editing the mail, here I choose the 4 supported Gmail encoding is Vietnamese Telex, Vietnamese VIQR, Vietnamese TCVN 6064, ê Vietnamese (type in dictionary style). After clicking OK, make sure to select Enable support from right to left editing, then click Save changes.
Back to the main interface you will see 4 typing methods that have been integrated into Gmail.

In the mail editor frame, select a typing method built into the virtual keyboard.

Telex typing method

Type according to the suggested keyword
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