Select Justification; Set Left Margin - CognitiveTPG A799II Programming Manual

previous data. This behavior can be used to an application's advantage to provide the ability to create compound characters
on the receipt station.
This command also functions differently in the A793 emulation when used in graphics:
n x 2 = Number of dots to be moved from the beginning of the line when this command is followed by a graphic command.

Select justification

ASCII
ESC a n
Hexadecimal 1B 61 n
Decimal 27 97 n
Value of n:
0, 48 = Left aligned
1, 49 = Center aligned
2, 50 = Right aligned
Range of n:
0–2, 48–50
Default: 0 (Left aligned)
Specifies the alignment of characters, graphics, logos, and bar codes on the receipt station in the print area specified by 1D
4C and 1D 57 according to the above table, until the printer is initialized, reset, or powered off. This justifies an entire line.
Related information
On the LEGACY emulation printer, this command is valid only at the beginning of a line.
Range of n on A793 is 0–255 using low 2 bits only:
00 left aligned
01 center
10 right aligned
11 center

Set left margin

ASCII GS L nL nH
Hexadecimal 1D 4C nL nH
Decimal
29 76 nL nH
Range of nL:
0–255
Range of nH:
0–255
Default:
576 dots (the maximum printable area)
Formulas
Sets the left margin of the printing area until the printer is initialized, reset, or powered off. The left margin is set to
((nH X 256) + nL) times horizontal motion unit) inches. The horizontal motion units are set by the set horizontal and
vertical minimum motion units command (1D 50), described in this manual. If the horizontal motion unit is changed after
changing left margin, the left margin setting is not changed.
The width of the printing area is set by the set printing area width command (1D 57), which follows this command. See the
set printing area width command in this document for a description of that command.
If the setting exceeds the printable area, the maximum value of the printable area is used. The maximum printable area is
576 dots. See the illustration.
To set the left margin to one inch at the default horizontal motion unit of 1/203 inches, send the four-byte string:
GS L 203 0
Or, to set the left margin to two inches at the default horizontal motion unit of 1/203 units per inch, send the four-byte
string:
GS L 150 1
Where 2 inches = 406/203, and 406 = (1 X 256) + 150.
Exceptions:
The command is effective only at the beginning of a line. This command is ignored if the line buffer is not empty.
If this command is processed in page mode, left margin is not changed until the printer is returned to standard mode.
A799-2PG0001B 4/2016
Chapter 4: Programming Commands 51