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Chapter 8. PPL3 Plus Emulation GEK-00029B
242
SGR (Continued)
All lining attributes are contiguous relative to the baseline of the
entire line, even when used on superscript or subscript text. This
applies to SGR superscript and subscript only, not to Partial Line Up
(PLU) or Partial Line Down (PLD). Do not use underline with PLU and
PLD. The result may differ depending on the printer.
Lining attributes extend to cover the full Horizontal Advance
Increment (HAI) except for the first and last characters on a justified
line. See Justify (JFY).
Superscript and Subscript Attributes
If superscript or subscript is requested, the printer attempts to
choose a font with smaller characters. The algorithm used is similar
to that used for Graphic Size Modification (GSM) of 50%, applied to
the font currently in use. This results in a size reduction only if a
smaller compatible font is available. The printer uses the Superscript
Vertical Offset (CFFF 3.5.3.1) field to determine the superscript offset
from the baseline, and the Subscript Vertical Offset (CFFF 3.5.3.3)
field to determine the subscript offset from the baseline.
Line feed distance, Graphic Size Modification (GSM), and active
position are not affected by superscript or subscript.
Superscripts and subscripts cannot be nested.
Emphasis Attributes
If bold printing is selected, the printer uses a bold (darker) font from
the current type family, if available. Otherwise, it uses an algorithm
to produce darker characters. See Chapter 4 for more information on
font selection and algorithmic transformations.
When slant printing is selected, the printer uses an italic font file, if
available. Otherwise, see the Programming Supplement for more
information about built-in algorithmic transformations and the slant
algorithm.
Wrapping algorithms apply to the unmodified character Characters
that have only the modified part extending outside the margins do
not wrap.