Undo
Didn't like the last change? Click Undo above the preview (or “Undo this” under the AI's answer) and your site goes back one step.
History
Click the clock button to see your last 30 versions, newest first, each named after what you asked for. Click one to preview it, and Restore to make it your site again.
Restoring never throws anything away: your current site is saved first, so you can undo the restore too.
Make a copy
Want to try something bold without risking your site? Use Duplicate (on the project card or in the project menu). You get a copy of the site with a fresh chat.