Hi all.
I am trying to do the following, but it is not working. Perhaps, I am doing something wrong?
When using dark mode, the natural yellow highlighter is yellow on white text. This isn't easy to read for me. I have a lot of these yellow highlights in the bible and many books. I changed the highlight to black text (as below):

However, none of my previous highlights that I made using this changed to black text.
On top of this, when I highlight a new passage and click "I," it still comes out yellow on white text (not black).

Is there a setting that I am missing to make all my highlights change to my new highlight or at least the new ones?
Thanks, John