SAM effects

[Axel]

Long press the center button. Then follow Axel's instructions to toggle through the parameters.

Not the center button, buddy. The tone button is the right hand one, which if you give a long press, will take you into the information screens. 

Yes long pressing right button takes you to the information screen.  Long pressing center button takes you to the adjustments, balance control first.  Then switch through the various adjustment screens with the right and left buttons.  Volume control to adjust.

Long press center button to exit adjustment screens.

Have you got a remote from a D250 or similar?  My remote - in standard configuration - doesn't work like that at all. A long press on the center button (mute) does nothing on mine. The right hand button (tone) controls the tone, balance and SAM settings after a short press, or information screens after a long press.