As a precaution, the autosave feature is turned on by default anytime you open an Event page to edit.
Autosave while editing means your page will keep track of any-and-all changes in real-time as you’re editing your page. To stop this and enable manual saving, uncheck the box in the upper right corner, near the green "Save" button.
You can click on the saving icon to manually save design changes. Just click the green "Save" button whenever you want to save a change.
Pro tip: If you're just getting started designing in Splash, we recommend working with Autosave off so that you can decide when you're ready to commit to a change. Refreshing the event page without saving will revert the page's design to the last-saved design.