Hi there, just a quick questionsI try to search for the answer but couldn’t seem to find anything or maybe I am just abit confuse because I have been working on my site for too long… 
I added a product then went to product options to add variants but I don’t see the option to add quantity for each variants? Where do I do that?
i.e. I am selling Pen with two color, so I made one product “Pen” and added two variants “Black” and “Blue” in options, but how do I set the quantity of each color?
Many thanks in advance I guess I should go back to sleep now
it is under option combinations. There is a tiny link at the bottom of the options. You may have to build combinations.