User`s guide

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physical page. The default state of the DECOPM is reset (off).
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This mode specifies the unit of measure used with other spacing
modes. When PUM is set (on), the printer uses either decipoints or
pixels as the unit of measure depending on the setting of the Select
Size Unit (SSU) sequence. When PUM is reset (off), the printer uses
a spacing unit that is equal to one character position (character cell).
A character cell's width equals the current horizontal spacing incre-
ment and its height equals the current vertical spacing increment. The
default state of the PUM is reset (off).
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This sequence works in conjunction with the PUM sequence to spec-
ify the unit of measurement used for spacing modes. When PUM is
set (on), the SSU selects either decipoints or pixels as the unit of
measurement. If the printer receives an SSU sequence while PUM is
reset (off), the unit of measurement (defined by the SSU) does not
take effect until PUM is set. This SSU remains in effect until another
SSU is sent or the printer receives a PUM reset sequence. The
default SSU is decipoints.
<ESC>[?52h
Set DECOPM
<ESC>[?52l
Reset DECOPM
<ESC>[11h
Set PUM
<ESC>[11l
Reset PUM
<ESC>[2<SP>I
Selects decipoints (1/720" or 0.35mm) as unit of
measure.
<ESC>[7<SP>I
Selects pixels (1/300" or 0.85mm) as unit of measure.