Help changing background color

Hi.  Hoping someone can help.  I want to change the area inside the blue border to an all white background, versus transparent as it is now.  Anyone know how to do this?  Thank you so much!

@Rodney1234 There may be a background option in the block settings but to make it easier I would just add a shape block and put it behind the block you have there.

Hi, thank you very much.  The shape box was a great idea.  🙂  Thanks again.