Change this sentence
Open this page in the editor and rewrite this paragraph. Watch the autosave note in the corner.
Add a block
On an empty line type
/and pick Callout. Change its tone, then drag it above the steps.Look at the history
Open the page's history. Compare your version with the one before it, and put the earlier one back.
Note
Publishing makes a release of the whole site. In the shared public demo publishing is turned off; in your own workspace it's one click.