How to add an new option to all existing product?

Hello,
Please I need your help. I want to know How can i add an new option to all existing product? I want to avoid to open each existing product to add the new option. It will take too much times. I read the list of api but I don't find a solution to my problem.

Someone can help me please?

Thanks in advance.

Regards

It should be possible with custom work. You can contact us at support@cartbinder.com

Hi

I have a paid extension that can do it:
https://www.opencart.com/index.php?rout ... n_id=39727

Please try the live demo.

A little extra work but get the free import/export tool and adjust the spreadsheet and upload the products back.
Mike