Is there a M or G code to wait for the operator to do something, then set something to continue?
Something like m3xx x, y, z, "Please place support material now"
where the x y and z tell the nozzle to go to that position (or it could default to home I suppose) and then display the string on the LCD or at least on Repetier's (or whatever) log?
Then it would wait until another event occurs, like a menu selection on the LCD or an enter key from repetier, etc. to continue?
I can think of several instances where this would be useful.