Resize frontend edit window joomla 2.5
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I would like to increase the width size of my frontend editing window.
I have seen in a joomla forum that it is a collonn issue (I did not really understood what was said on it...) on guy said that I should change ` task  " $_REQUEST[task] " into "layout"` but I do not have that code in my index.php of the ("mega") template...
Should I add this line somewhere in the index ? How ? Thanks a lot!

Giom