Variant grid in Sales order

Dear All,

I am into implementation where great deal of wholesale specific orders will be created through standard SAP SD Sales order. now for all generic articles that we select in purchase order, a variant matrix (example size and color matrix) opens in a separate tab which allows us to put quantities against each.The grid in PO looks like this: the screenshot is from PO - item detail - Variant tab:

I could  not find such matrix to put order quantity in sales order. Is this by design or some patch or component is missing?

Thanks,

Binita