You can set your own titles for puzzles and solutions, which will be used in the additional output. One of the uses for this is for books in other languages than English.
You can type your own text for the Puzzle Title and Solution Title. By default, the hashtag symbol will be replaced with the puzzle number. If you want to use the hashtag symbol in your title, for example to print "Puzzle #13", you can set the 'Placeholder' to '@', and the title to "Puzzle #@".