Hi Takayuki,
By your answer i can realize i was not so clear , what i would like to do is :
having a line with a checkbox for receiving mailing updates from us , which is simple to do , however i would like the checkbox to be ON by default and if someone does not want the mailing updates they will have to unmark the checkbox.
when i try to add a checkbox i do not have the option of having it marked ON as default .
do you have any idea how to solve this ?
thank you