The CW regenerator is an experimental function that we are actively developing, which works on the CW (Morse) signal in the centre of the passband. It detects the dots and dashes and regenerates the CW with a clean sine-wave.
The detection frequency is the same as the centre frequency of the bandpass filter. So to change that frequency, change the centre frequency of the bandpass filter.
The following parameters are adjustable in the "CW regen" submenu: