Two weeks ago I was able to use the highlighter function to change the color of the spaces between some of the words in a paper. (Basically, I was highlighting the relevant spaces in red.) This worked intuitively.
Today, I am doing exactly the same thing as far as I can tell, yet the highlighting won’t “take”. I can highlight letters, and I can highlight strings that include both letters and spaces, but if I try to highlight a space, it simply won’t highlight. It remains white.
Any idea what could be going on here? Is there some setting somewhere that would affect this?