The trick is done by the following setup-parameters in <Global Menu/Midi Port Config>
KEYBOARD DEST := “INT+ EXT”.
That’s how I have done it and allows me to swap.
This is, what the manual says:
KEYBOARD DEST controls whether the keys of the KEYBOARD will send MIDI note data or not. When set to INT, no MIDI data will be sent. When set to INT + EXT, MIDI will be sent internally as well as externally. When set to EXT, MIDI will only be sent externally.
You should also make sure, that the midi output is activated by:
OUT PORT FUNCTIONALITY := MIDI
OUTPUT TO := MIDI/USB/MIDI+USB
I recommend to read the compete section of the manual. There are more useful settings explained how to setup midi in/out for various sources.
This is what the manual says in section Keyboard Control:
EXTERNAL KEYBOARD MODE Pressing [MIDI EXT] will turn the keyboard controls of the Analog Keys into an external MIDI keyboard controlling other gear. The KEYBOARD keys, JOYSTICK, DATA ENTRY knobs and the LEVEL knob will be dedicated to sending MIDI Out messages. Until deactivated, the Analog Keys synth and parameter settings will not be affected by these controls, only the external MIDI gear. Press the key again to deactivate. Note that the internal sequencer and synth tracks will continue to work normally even while the external keyboard mode is active