an example can be found on AMOSPro_Examples:Examples/H-1/Help_16.AMOS
Sets the writing mode for all future text operations.
The first value selects the actual writing style.
=1 REPLACE (default)
=2 OR =3 XOR =4 AND =5 IGNORE (don't do any printing at all!)
The second value allows you to choose which parts of your text will be printed on the screen.
=0 Normal. Both Ink and Paper will be printed
=1 Paper. Only print the background =2 Pen Writes the text on a background of colour zero. Useful with OR mode.