I love Arduino, but I have a sketch that waits for a pressure to reach a certain level (or wants to display a countdown or....) and it's a hassle to not be able to overwrite the existing line in the serial monitor. I can attach a different monitor, but that's also a hassle. There may be other non-printing characters that would be helpful to recognize - newline without CR for example.
Also, on the Serial Monitor topic, how about a menu item to "Save To" a text file.
Any chance that a bit more Serial Monitor sophistication can be incorporated next time around? Thanks so much for all you do!
What I can tell you is that there have been several requests of this type over the years for the classic Arduino IDE's Serial Monitor, and they have been consistently rejected by the Arduino IDE developers. You can learn more about that by checking this issue and all the related issues linked from it:
We now have an interesting new proposal which would allow the community to extend the capabilities of the Arduino IDE 2.x Serial Monitor to provide the sort of thing you are hoping for: