keithcurtis said: Hi Tim! That is likely the work of the Roll20 syntax highlighter. It wants to tokenize certain common comments to highlight them. Try these: // TODO // FIXME // NOTE // HACK // XXX You will find that all of them highlight in green except note. The highlighter recognizes these common comments and wants you to be able to find and see them easily. Edit: With some guidance from chatGPT, I managed to track down the actual Regex rule through the console: \\b(?:TODO|FIXME|XXX|HACK)\\b That matches the test cases above. Cool beans, thanks Keith. I had no idea. Though my plan was to start using //xxx to stand out. Previously, I used to write xxx without saving anything anything to help find my way. Just started to comment it yesterday.