Through Bundle Builder, you can select both optional and required products to add to your bundles:
Go to Bundles.
Select the bundle that you would like to edit.
The process of adding products to your bundle varies according to whether your bundle is on a single page or in multiple sections; follow the correct guide for your bundle structure below.
If you are creating a Single Page bundle, please read our guide on Adding Products to a Single Page.
If you are creating a bundle with Multiple Sections, please read our guide on Adding Products to Multiple Sections.