Trackmate: semi-automatic tracking in multi-channel images

Hello,

I am using TrackMate (thanks for this great tool!) to track cells in 2-channel images. For the automatic tracking part I can select channel 2 for the spot detection.

To add missed tracks I would like to use the semi-automatic tracker. However, I am confused on which channel it is acting. I have the suspicion that it always uses channel 1, even if channel 2 was chosen beforehand for automatic tracking. Does someone know if this is true, and if so, does someone know of a way to semi-automatically track in ch2?

Thanks already!