Actually, the TinyG Wiki confused me on this point because it lists the status of the M6 (Tool Change) command as “No operation at this time”. That made me think it did nothing. In fact, the M6 command stops the execution of GCode on the TinyG, and communicates that to Chilipepper, which highlights the “Pause” button in their GCode widget. That’s exactly what I was looking for above (“or an equivalent means of pausing execution”). So, problem solved. Thanks for the quick reply…Jack