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I know that I can do Ctl+Z and Ctl+Y for undo redo, but how do I make that a custom tool in the MVC editor? I know this may sound crazy, but some users are just not smart enough to use Ctl+Z and Ctl+Y! I tried calling the following script when the custom button is clicked, but nothing happens in the iframe:
document.execCommand('undo', false, null);