You know how IDEs give you a red squiggly underline if you use a variable that hasn't been defined? I want the same thing for writing prose. Red underline if yo... (opens in new tab)

You know how IDEs give you a red squiggly underline if you use a variable that hasn't been defined? I want the same thing for writing prose. Red underline if you refer to a non-obvious concept that hasn't previously been defined in the text.