I downloaded a theme and have since changed almost all of the colors, text, sizes, etc. But when I open a new block it comes up in the formatting I downloaded and about 5 steps later copying and pasting it looks the way I want it. How can I set my preferred formatting (new blocks) as default? Here is a screen shot. I prefer the simple black/yellow text blocks I've constructed. A default theme block is shown in the light blue prior to my edits. Thanks.