On the `multiple channel mode` of Pastavi, I added the button to add the channels related to the ASC error signal, ASC feedback signal, oplev of Xarm, or oplev of Yarm. Please take a look at the attached images.

I removed the option to specify the xmin and xmax on the time-frequency map. This option is often set by mistouching... The time information on the time-frequency map is fixed by the input data.