The single driving force behind the computer revolution in comics, with the possible exception of the computer itself, is the advent of digital lettering. Even the earlier introduction of computerized color separations cannot compare to the sweeping changes to the industry that resulted from that first letterer converting his hand-lettered alphabet into a computer font. From that point on, it was a runaway train picking up speed. On the other hand, many hand letterers and production personnel have good reason to compare it more to a tornado in a trailer park.
Digital Prepress for Comic Books covers the entire process of digital lettering, including creating sound effects, logos, and balloon shapes. Below is a section covering a key production issue: the bounding box.