To turn a simple product into configurable:
Go to Products → Products in the Administration panel of your store.
Click the name of a simple product for which you’d like to create variations.
The editing page of the product will open. Click the gear button in the upper right part of the page and choose Convert to configurable product. Confirm your decision.
You won’t be able to turn a configurable product back into a simple one, unless re-create the product and its option combinations manually.
After that a simple product will become configurable. The option combinations of that product will turn into variations automatically, with the allowed and forbidden option combinations of the product being considered:
- If a product has allowed combinations, then variations will be generated only from these combinations.
- If a product has forbidden combinations, then variations won’t be generated from these combinations.