# Configure optional items

Enable customers to purchase complementary products at checkout by using optional items.

## Index

This article has multiple variants. Fetch one of the following URLs to view specific content for your use case:

- [Full page](https://docs.stripe.com/payments/checkout/optional-items.md?ui=full-page)
- [Embedded form](https://docs.stripe.com/payments/checkout/optional-items.md?ui=checkout-form)