The Macintosh has 72 dpi screen resolution. The ImageWriter default print resolution is set for 80 dpi.
Basically, "Tall Adjusted" makes up for the difference between the screen and print resolution, thus giving the user a more WYSIWYG print out. For the best print out, always use the "Tall Adjusted" print option.
If text is not staying in the boundaries on the print out, the user has NOT selected "Tall Adjusted".