You may want try a serach and see what you find. I don't know of any specific manual and only 
tried it a long time ago. You just select the font,input where you want to start along with feed rate, 
pick the direction of how the text will be placed, input the size and cutting  depth, type something, click the wirte 
button, return to mach a there is the code for what you typed. Can only do a single line of text though.
RICH