> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.optis.me/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Make the option required before adding to cart

On the** option set edit**, enable the "**This option is required**" to make the option required before adding to cart

![](https://storage.crisp.chat/users/helpdesk/website/22429817467a0000/image_st1re5.png)