Tally Genicom Matrix Printer - Manual (Page 100)

This sequence terminates previously set additional character space defined with
ESC SP.
Following sequences will cancel the HMI mode:
ESC ! print mode selection
ESC @ printer initialization
DC2 reset condensed print
DC4 reset enlarged print mode (set by <SO> or ESC <SO>)
ESC g character density 15 cpi
ESC M character density 12 cpi (Elite)
ESC P character density 10 cpi (Pica)
ESC p proportional spacing ON/OFF
ESC SP character spacing
ESC W continuous enlarged print mode ON/OFF
SI condensed print ON
SO enlarged print mode (automatically reset after one line)
Character Spacing 17