This might be a very easy question for you, but its what I am wandering for hours..

MY issue is, I have a configurable product `'PRODUCT-1'` with custom attribute `SIZE`..now I want to add an other custom attribute `COLOR` in my product.. 

One way I know is, go from scratch, delete the preivous product and add new product with 2 attributes...This will not serve me better in my case..

Is there a way, I can add one more `custom attribute` to `configurable product` ??

thanks for help..