On the following way you can add widgets (page builder elements) to the page builder to build your page.
1. Click the + icon2. Select how many columns you want to start with3. Click the + icon inside the column and drag one of the widgets from the left panel on top of the + icon4. Hover the widget in the page builder, click the pencil icon and edit the content in the left panel5. When you’ve finished building the page click “Publish” to save the page