Why the window when creating and adding a list in the product options is so small and at the end does not let me add the new options the ADD bottom disappears

Question:
How can I resize the window or how can I apply the changes in the list?
Product:
Wix Editor, Shop

What are you trying to achieve:
I am adding a list of product options 40 in total and when I add the whole list the button to apply disappears and I can’t save the list. How can I increase the window size ?