ditch drafts in autosave function

Even after I close and log out of WP, when I log back in unwanted drafts are still in the HISTORY revision section. I never clicked UPDATE…

I purposely did not click UPDATE and can’t seem to delete the many unwanted draft items in REVISIONS section. Since I’m a designer and try many elements and type treatments, I don’t want the page updated until I’m ready to click “update.”

It used to be when I left the page I was prompted the changes would not be saved, which is a quick and efficient way for me to work.

Thanks for any help you can give.