I-Data 5250 ALLY - Manual (Page 206)

AGILE 5250 ALLY User’s Guide and Reference Page B-24
Command: Set Horizontal Margins (SHM)
Printers: 3812, 5219
Format: 2B D2 nn 11 lmlm rmrm
Action: Specifies the left and right margins for subsequent
printing.
The lmlm parameter specifies the left margin position in
1/1440-inch units.
The rmrm parameter specifies the right margin position
in 1/1440-inch units.
Both the lmlm and rmrm parameters are relative to the
physical left edge of the page. Valid values for both lmlm
and rmrm parameters are 0000h through 7FFFh. A value
of 0000h means no change to last setting.
The rmrm parameter is used in justifying text only when
Set Justify Mode (SJM) has turned justification on.
IBMEMUL: Same as IBM. The rmrm parameter is used only in
justification calculations.
275EMUL: No operation.