NCR 7167 Owner's Manual page 143

7167 Owner's Manual Chapter 6: Commands
This command is ignored if the line buffer is not empty, and only effects the Receipt
interface.
If the setting exceeds the printable area, the maximum value of the printable area is used.
The maximum printable area is 576 dots for 80 mm paper width and 424 dots for 58 mm
paper width. See the illustration in the Set Left Margin command (1D 4C).
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