Yes, that functionality is not available directly in the cook builder so, yes, it would need to be done after download which requires a subscription.
However, you can download the tutorial package, see the basic component that was generated in Cook, then follow along with each change, comparing your changes with the incremented version packages. This will show you what can be achieved. They are really simple examples but demonstrate the principles of coding in your component afterwards.
I'm sure you'll think the subscription is worth it!
Gez