How to create form like below?

I mean put the featured images on side instead of like tabs details, categories, group, stores.

Is there any additional CSS? Because, I just using secondaryTabs and it doesn't work.

Thanks

You also need to add this in your controller :

public $bodyClass = 'compact-container';

Then you will have to change the html of the create.html and update.html views of this controller. You should take a look at this controller's view to have an example => https://github.com/octobercms/october/blob/master/modules/backend/controllers/users/create.htm

Thank you. It works!

I test this out and while it works, it applies to all controller actions to which controller it is applied. How do I choose this layout to only affect on certain actions? For example, Preview action will have these layout, but Update action will use the default layout?

Thanks

Modify the bodyClass property from the specific controller action and return the controller action that you want to actually run.

public function preview($recordId) {
    $this->bodyClass = 'compact-container';
    return $this->asExtension('FormController')->preview($recordId);
}