Italicizing is nice if you want to put emphasis on a phrase, or call to an outside source.
It's the same as Steam's Italic text command. Here's an example:

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Don't be alarmed by the squares, that's how you know you've done it right.

Ever liked those prompts where the game chooses a random player's name and makes the prompt about them? With this command, you can call unwilling victims to the stage.
Simply put <ANYPLAYER> into your prompt. An example:

Really? Only 2 custom fonts? That can't be right... If you know any more, please let me know in the comments. As for now, enjoy these secret fonts!

Here's an uncut and unedited video of this steam guide in action.