This trick doesnot require any technical knowlege and it can be used by using just simple codes.
Here are the facebook codes for sending bold and underlined text in facebook chat.
For Sending Bold Text :
whatever you type between * *(two stars ) will automatically turns into bold.
Example : You write
I *really* mean it.
Turns to
I really mean it.
For sending underlined Text :
Whatever you type between _ _(two underscores) will automatically turns into underlined text
Example: You write
I really _mean_ it.
Turns to
I really mean it.
For writing Bold+Underline :
Whatever you type between *_ _* will automatically turns into Bold+Underline
Example: You write
You *_mean_* it?
Turns to
You mean it?
