Beginning with WordPress 4.0 they introduced the new writing experience to the post editor where the more you write, it adjusts so the scroll bar was eliminated.
If you don’t like that feature you have the ability to stop it. To do that we’ll just go up, login to my site and go to the post area.
It can be new or old post it doesn’t matter.
You’ll click on the screen options menu.
And you’ll see a checkbox here to enable full height editor and distraction free functionality. I’ll uncheck that.
And now my scroll bar will be back as I type more here.
I hope you liked this article and found it helpful.