Articles Multi Pages Plugin, exists?

For both posts and Pages created in WP there is a quicktag (though lately it’s missing from the Quicktags listed above the text area)
<!--nextpage--> just insert it where you want your “articles” to be paged.

Thanks for reply.

How I can add an new button in to post editor, called “nexpage” to add the code <!–nextpage–> in message?

Try to follow this tutorial
https://www.tamba2.org.uk/wordpress/quicktags/

Thanks a lot man, work fine!