Let me add, if I may be so bold, that in mainstream publishing and the better style guides, bold and italics are always specifically denoted and not for just general use. Lots of authors use italics for thoughts and mostly it creates a reading problem. In some cases no quote marks and no italics but always (!) the tag "he thought." preceded by a comma after the thought.
Like this: Bill always wondered about that, he thought.
Keep it simple. Trying to insert graphics to substitute for text can really get nutty.
Old guy who likes to chat and day dream about literature, music, and/or relationships. "Drop me a line..."