Please I need help.
I would like to disable the sidebar editor frontend for registered users.
In the global settings have hid the bar, but the button 'toggle sidebar "keeps appearing.
Which PHP file I disable this function?
Thank you.

I found a solution.

media/k2/assents/js/k2.js

line 235

$K2('#k2ToggleSidebar').click(function(event){
event.preventDefault();
$K2

('#adminFormK2Sidebar').toggle();
});

Hi. Modifying the k2.js file is not a good idea. You will loose your changes in case of update. You can try making a template override to the itemform.php or use CSS to hide the bar.