On the left side of the screen, gently pull on the tuning knob, separating it from the radio.

The upper knob on the right is the volume. Gently pull it away from the radio to remove it.

The lower knob on the right is the squelch knob. Remove it in the same way as the other two knobs.

Set the three knobs aside, so they can be put back on later.

The volume and the squelch knob are the same part and can be interchanged.