To insert quotes in messages:
1/ copy and paste the message of the person you want to quote
2/ put this message in quotes using the "insert quote" icon (2nd one from the right, above the smiley icons)
3/In the quote box, add the name of the member you're quoting. EX: [ quote=x ] text [ /quote]
Which gives :
x said:
4/Then, write your answer below
You can also directly click on the "quote" button on the above right of the message you want to respond to. In that case, if different members are quoted in the same message, make sure to attribute each message to the right member, by closing each quote properly:
EX : [ quote=x ] [ quote=y ] y's text [ /quote ]
x's text [ /quote ]
which gives :
x said: