Well I have seen many people did that. Like "I will kill you" and he cross the "kill" and change it how to do that? thanks I need guides for this forum haha

scratch Like that? use [s*][/s*] (without the *).

It's called a strikeout. On the top right hand side of the reply box you will see an 'S' symbol with a line through it. Highlight the text you want the line through and hit that symbol.

Or you can put
s code: tags around the word you wish to have the line through.

Like this

test ?