Bematech LR2000 Programming Manual page 45

 If the width set for the printing area is less than one vertical line, the following
[Reference] GS L
GS :
[Name] Start/end macro definition
[Format] ASCII
Hex
Decimal
[Description] Starts or ends macro definition.
 Macro definition starts when this command is received during normal
[Notes]
 When GS ^ is received during macro definition, the printer ends macro definition
 Macro is not defined when the power is turned on.
 The defined contents of the macro are not cleared by ESC @. Therefore,ESC @
 If the printer receives GS : again immediately after previously receiving GS : , the
② If the printing area width cannot be extended sufficiently, the left margin is
reduced to accommodate one character.
③ If the printing area width cannot be extended sufficiently, the right space is
reduced.
processing is performed only on the line in question when data other than character
data (e.g., bit image, user-defined bit image) is developed:
① The printing area width is extended to the right to accommodate one line
vertical for the bit image within the printable area.
② If the printing area width cannot be extended sufficiently, the left margin is
reduced to accommodate one vertical line.
GS :
1D 3A
29 58
operation.Macro definition ends when this command is received during macro
definition.
and clears the definition.
can be included in the contents of the macro definition.
printer remains in the macro undefined state.
LR2000 Programming Manual V1.2