Yes, that is correct. There is a small, white, recessed button on the back that u can use a pin or small screw driver to push in. For t1-3, put the nob on that position and press the button to change the tone (one press= new tone). For the alternate (when manual is pushed), press and hold manual and cycle through to the secondary tone you desire. The push and hold method is also how you change the radio, man1, and man 2 settings. For HF, press man to turn it on, find you tone, press man again, new tone, etc