Here’s picture."Rotary attachment switch location inside Thunder laser. "
Right hand side.
If still have problems, ask another user. Many have been trained on the rotary attachement.
https://dallasmakerspace.org/wiki/File:Rotary_pic2.jpg
Also check to see that the rotary engrave option is unchecked in RDWorks.
Link to screenshot: https://dallasmakerspace.org/wiki/File:Rotary_pic3.jpg