Below the menu bar for development of Arduino sketches.
The most important functions:
  1. Chose the right hardware
  2. When connecting the board to the computer, the right com port must be selected. It could be that an additional serial driver must be installed for communication with the board (CP210x for example). Downloadable from the internet
  3. Button for starting the serial monitor. Be aware to select the correct baudrate
  4. Start the submenu for adding libraries
  5. Buttons for compiling en downloading the sketch software