The command needs to be inserted at the very beginng of the print job, after any reset that may exist. It will stay in effect until you explicitly give another pitch command or the printer receives a reset command.
Note that the <esc> is the single byte chr(27)
How you enter that will vary from one text editor to another. You will have to check the help for the editor to see what mechanism is available to enter "special" characters into the file.
That is chr 27 in decimal, 033 in octal, or 1B in hex.
More than likely, the decimal value is the one your DOS editor will want.
Jim Asman
jlasman@telus.net