Every now and then I use my nanoVNA and I forget that after changing the display configuration and then choosing Config/Save, nothing seems to happen and I loose all the settings.    I have to use Calibrate/Save/Save0 if I want to have it remember all the settings after a power cycle.  So, it would make sense that Config/Save would do that since I am not changing the stimulus or the calibration just the configuration of the display (which traces do what, what the value/div, etc) it would be nice to have it return to those configurations when turned on next time.