Temp, Humidity CO2 sensor and library.

I have been using the cozir sensor for a few years now, and your code/libraries have been great. I would like to add it to a TFT touch screen and for the life of me cannot find a way to print the readings to the screen. What is the easiest way to go about tackling such a task? Seems like reading the Serial.print since we are already establishing that would be the easiest, but does that still work when you're not connected to a computer? I am not asking for someone to write the code, because I want to learn how to do this myself, but to point me where I can learn the easiest and most efficient way to perform the task.