The answer is italics and underlining. It can be used vice versa, although usually underlining is used when something is either hand written or typed; if using a PC you can italicize. But if you begin using italics, don't switch to underlining within the similar file. These two are used most frequently for names of longer works such as books, newspapers, films, TV shows, magazines, a complete symphony, plays, long poems, albums. It could also be used for titles of paintings, ships, sculptures, aircrafts, trains and spacecraft.
