How to mass set full width for over 1000 posts ?

Hi @nicoco35,

You can do that using default WordPress bulk edit. Please check this short video.

I hope it helps.

Kind regards,
Herman ??

Hi @nicoco35,

I hope you find my previous reply useful for you. I am closing off this topic due to the lack of activity. Feel free to reply to this thread or open a new topic if you need further assistance.

Kind regards,
Herman ??