Please read it closely.
We're going to make this simple.
First, of course, in order to do this, he first had to reduce the document so that the margins were the same, since the original PDF distributed by CBS is quite a bit larger. Then he superimposed the two documents, such that the margins on all sides lined up.
What he then discovered is that Times New Roman typeface is, when viewed on a computer monitor, really, really similar to Times New Roman typeface. Or rather, really really similar to a typeface that is similar to Times New Roman typeface.
Um, OK then.