Although it doesn't exactly get me to the final destination, I did find a workaround to hide the gray text for direct save as png file type.
- Set background color to white by setting system colors to Black on White
- File: Options: System Appearance: System Colors: Black on White
- Set Secondary Highlighting to white
- File: Options: System Appearance: Global Colors: Graphics: Secondary Highlighting to white (by setting color pallet to R:255 G:255 B:255)
- When this is done the system colors change from Black on White to Custom, which is fine but is why the attached screenshot shows custom.
- For reasons I didn't explore, changing secondary highlighting doesn't change the color of this text when on the good old black background drw (or blue background model). Thankfully I found it anyway since I needed a white background but one could easily have missed this and thought it was not possible to change the color of the floating gray text.

Unfortunately, the scaling and the fickle resolution 'control' based on zoom level may still be an insurmountable problem for us. Feel free to post anything else if you find something that may help. Thank you all for your ideas and help in this thread!