Israelsimba 0 Light Poster

Im using an epson dfx 8000 to print my reports. the printer prints on preprinted stationery and was printing fine until recently after a service nd it now adds a blank line at the top of each new page. this means my columns wont sit properly into yhe preprinted paper.

i know there are control codes like ESC C that are used to tell te printer to print certain way. the problm is that i dont know where to send the codes and how to do it? is it in DOS or Windows because the printer has no screen.
thanks