HI, 

I am trying to find a way to attach a photo to a specific variant.

Let's say I have a Tee shirt in different size S,M,L and all of them are in 3 different colours black, white and blue

I can attach a specific image for every combination but that means for the black color, I have to upload the color 3 times, S, M and L BUT this is the same picture for the 3 sizes.

Is there a way to upload only one time the picture for the black color for every variant at the same time?

thanks