You can map a parameter value to an oscilloscope channel that is not in the drop down menu list.
If you want to display a parameter on an oscilloscope channel that is not on the drop-down list, then you can manually map this parameter
You can't map a single bit to an Oscilloscope channel, but you can the parameter word, which makes up the bits.
Below is a screen shot that shows how the channels are set default. SAMP0 SRC is for channel 1, SAMP1 SRC is for channel 2, and so on. If I wanted to change channel 1 to be P4200, then I'd add to my code SAMP0 SRC P4200.