Add a button to a Silverstripe Page in the CMS

gistfile1.txt

// Add an extension to SilverStripe\Admin\LeftAndMain

class LeftAndMainExtension extends Extension
{
    public function someFancyAction($data, $form)
    {
     // do some fancy stuff
    }
}


// Add to your PageType class where you want the button
    public function getCMSActions()
    {
        $actions = parent::getCMSActions();
        $buttons = $actions->fieldByName('MajorActions');
        $buttons->push($newFields = FormAction::create('someFancyAction', 'Do Action'));
 
        $newFields ->addExtraClass('btn-outline-primary font-icon-tick')
            ->setUseButtonTag(true);
        return $actions;
    }

It would be good to see what you need to return in the action.

Great example also!!! love it.