"Set, alignment and letterspacing
on the Monotype are immutable, handed down to us by God and Stanley Morison.
blackletter doesn't make it any easier to read.
It is different from both letterspacing
An early version of Image EMACS  adopted a simple approach to horizontal letterspacing in which the space after each character is preserved as changes are made to the text image.
The letterspacing strategy illustrated in Figure 3 allows the amount of space that precedes or follows a character to depend (implicitly) on the identity, style, and size of the character.
Although desktop systems have reduced the need for comping type, it is still the best way for a student to learn the very important skills of letterspacing
Most digital dtp systems use a single "master" outline, so this kind of compensation is still necessary - though it may be that at display sizes something more complex than global letterspacing
The chapter on "Type and Production" provides a pragmatic overview of the design, printing, and binding processes of camera-ready copy, including information about type size typeface, leading, letterspacing
, wordspacing, copyfitting, offset lithography, and color printing.