Is there a difference between a shaded and an unshaded pilcrow? I am trying to format a block letter and in the unarranged copy, I am supposed to correct- there are both unshaded and shaded pilcrows.
This is a matter of style/font.
The pilcrow is usually drawn similar to a lowercase q reaching from descender to ascender height; the loop can be filled or unfilled.
There is evidence that an unfilled loop was used in the original character, looking somewhat like this: ⸿.
Over time, the pilcrow evolved to become aligned and the loop was filled in standard practise:
...the symbol [loop] was filled in with dark ink and eventually looked like the modern pilcrow (¶).
However, even though a filled pilcrow is the most common form, this does not mean an unfilled pilcrow is incorrect. As I have mentioned, it's a matter of style. Take your pick!