change preference settings in member's prfofile?

Is it possible to change the preference settings in member's profile?For example, add a question that says, "Newsletter format you would like to receive" with the options below:
1)basic test
2)html text
3)both
If this is possible, how do I do that?

Hello,

I think it's not possible, but you can do a suggestion HERE

Have a good evening,
Maxime