1. Adding variants
Product variants can only be created for already existing products. See the guide here. If you have an existing product, go to Store > Products and click on a product for which you would like to add variants.
'Add new variant type' button allows you to assign variant types and values. For example, a variant type would be 'color' and variant value 'white', 'black' and 'red'. After entering each value press enter to confirm. You can add more than one variant type for a product.
Once a variant type is created, you can copy that to another product from it's variant type menu.
2. Removing variants
You can remove a variant by clicking on the gearwheel icon.
NB! By adding or removing variant types, new list of variants will be created and previously saved variants will be removed.
3. Managing variants
Product variants can be managed at Store > Products menu and by selecting a desired product. You can specify price, stock and status in 'Edit variants' section. For example, if a black size M T-shirt is out of stock, you simply click on the values 'M' and 'Black' and set it as 0 in stock. Don’t forget to save changes.