> For the complete documentation index, see [llms.txt](https://docs.optis.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.optis.me/product-options/advanced-setup/make-the-option-required-before-adding-to-cart.md).
# Make the option required before adding to cart
This feature ensures that customers must select an option before they can add the product to their cart.
#### **Steps:**
1. In the **Option set edit** page, locate the element you want to make mandatory.
2. Under the **Option label**, find and enable the "**Required field**" checkbox.
3. Click **Save** to apply the changes.
**Result:**
* Required options will display a **red asterisk (\*)** next to the option name on the storefront.
* If a customer clicks Add to cart without making a selection, a warning message will appear to prompt them.
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