I have this:
I've been searching for tutorials online on how to change the colour of part of a shape/text, but I have not found anything and I also do not know what this particular method is called.
I tried using the various variants from the
Combine Path menu (which I have used before to create various shapes), but it has been a no-go.
How can I make the inside part of the 'B' white, while leaving the part of the 'B' outside the circle it's current colour?