undo "make this the home page"?

[Bob Raiselis]

I have a site where an editor clicked on the "make this the homepage"
selection on a story and of course now the content of that page has
replaced the homepage content. How do I undo this so that the homepage
reverts to what was there before and does not load the content from the
other story? Can't fin anything in the docs about undoing this.

Bob