I'm slowly learning the basics of HTML and CSS, so keep that in mind, please. It used to be that there was a button to insert a PAGE BREAK into a post that would then present as a link that read "MORE" that you could click on to be taken to the entirety of the post. That doesn't exist any more and I am thoroughly confused as to how to make that happen.
When I enter
"<!--nextpage-->", everything after the tag just disappears, without any indication of how to link the rest of the post to a new page.
How do I do this?
Thank you in advance for your help.