I have two printers.
I open up two instances.
I use the trick to have one printer be at a baud rate of 115200 , and the other printer with a baudrate of 250000.
In this way i recognize the difference.
But it would be better to just show the name of used printer in the form title , next to the text : Machine Control Panel.
But all in all , a better colourfull way of showing which printer is connected to which control panel with with profile. would make my live a lot better and cheaper.