How to use g mail or yahoo mail in rich text mode orHTML mode using safari on ipad ?

[ipad.subu]

Hi

At the outset a heartfelt thanks to all the Samaritans replying my questions

I have one more

How to use g mail or yahoo mail in rich text mode or HTML mode while composing mail using safari on ipad ?

Presently I get to see only plain text mode while writing / editing mail

I use iPad 2 NON JB version

I am willing or change browser or use an app or something to get to a rich text or HTML mode on g Mail and yahoo mail

RegDs
Subu