Where are my exclamation marks (missing characters)?

Some fonts only have characters available for the letters, but nothing to represent the punctuation marks. When this is the case, you will just see a rectangular box, and you need to know this WILL be printed. If you do not want this box to appear, then delete the character, or you could try a different font. There are so many fonts to choose from, you are almost certain to find another that you like.