How to save your Nimble Builder sections as draft ?
Nimble Builder leverages the WordPress live customizer features for auto-drafting and schedule publishing. You can safely build and save drafts of your content before deploying in production.
You can also save and reuse your sections in any page of your site.
For that you simply need to click on the gear icon next to the Publish button on top of the customizer, and select "Save Draft".
If you have published too fast and you want to restore a previous version of your work, that's not a problem, Nimble Builder keep a log of all your changes.
More details here : How to restore a previous version of your page with Nimble Builder for WordPress?