Looking at the sd_synth_fast example (in Sue2) using the documented tutorial, I see several probe points on the schematic such as noiseout, vin, & sd_in.  Adding something like an 'in' or 'out' probe  is easy: so is editing the sim file to add the probe to the node list. How so do I enter in a probe into the schematic like vin so I can enter it into the probe list and view it in the simulator? I can find no documentation on this.