please help !

You mean like Italics and bold? Easy peasy, I'll show you.

For italics, you put an 'i' in between these two <> at the beginning of whatever you what to have in italics, and this '/i' in between these two <> at the end. I can't actually type it because it doesn't show up when you submit your response.

For bold, you do the same but with a 'b' and for underlining you do it with a 'u'.

The end product looks like this

or this

or this.

i am not sure but may be they use word pad to change the fonts and then paste the lines