What is the Divi Library and why save or load an existing layout:
The Divi Library is place that stores pre-made layout templates as well as your custom saved layouts, modules and widgets (Divi > Divi Library).
Save a layout to the Divi Library if you would like to use it as a template for other posts or pages. This will cut down on the creation time needed for those future posts or pages.
To Load a Original / Saved Layout from your Divi Library or duplicate a page:
This is a good option if you want reset your page and rebuild a demo page again (You have all demo page layouts in Divi Library).

- First you want to add a new page or post depending on what you’re creating.
- Enter a post or page name and click “Use Divi Builder”.
- Click “Load from Library” or “Duplicate a page” in the top purple bar or your editor.
- Select “Your Save Layouts” in the top purple bar of the popup.
- Click on the saved layout you want to load.
To Save a Layout in your Divi Library:

- Edit any page that contains a Divi Layout and enable the Visual Builder
- Expand the Visual Builder’s Toolbar by clicking on the Ellipsis icon

- Click on the Save to Library icon

- Give the layout a descriptive name.
- Click on the Save To Library button.