Sometimes I have 3 times a IDE open on my PC.
Most of the time it's because I have 2 sketches what should be one sketch.
If uing the serialmonitor, in the bar there s alway your com port and kind of port.
For example COM5 (Arduino/Genuino Uno)
My suggestion is to view the name of the Sketch also in the bar.
For example HelloWorld.ino - COM5 (Arduino/Genuino Uno)
For me it will help al lot, because I sometimes have more then 5 sketches open and 4 boards attached.
Labeling an Arduino is not the solution.
I also can't see more then one serial monitor. Maybe this can be also integraded in the upcomming version.
What do you think my friends ?