User`s manual

7–71Digital Emulation
Set Left and Right Margins (DECSLRM) (continued)
If Autowrap is enabled and the active position is grater than the
specified right margin, the next printable character causes a carriage
return/line feed before the next character is printed. If Autowrap is
disabled (truncated), the characters that follow this command are
ignored until the cursor is returned to the printable area.
When character pitch is changed but the same physical margins are
desired, reset the margins using this escape sequence before sending
data. Changing horizontal pitch resets the left and right margins to their
printable limits (column 1 and the furthest right position, respectively).