When I add a global attribute then go to the product option page to add the option to the product, I cannot choose the sizes I need because every size option is populated inside the same input box. See attached file...
How do I go about fixing that
please review the docs about global options , with parent/ child attributes
https://abantecart.atlassian.net/wiki/spaces/AD/pages/10125381/Global+Attributes (https://abantecart.atlassian.net/wiki/spaces/AD/pages/10125381/Global+Attributes)
the section you need is towards the bottom of the documentation
This should help you get it right.