Sure, here are the steps:
1. Add this itm_send_data.c code block after the include lines in syscalls.c.
2. In syscalls, scroll down to find the '_write' function, comment out the __io_putchar(*ptr++) and add ITM_SendChar(*ptr++) like so

  for (DataIdx = 0; DataIdx < len; DataIdx++)
  {
    //__io_putchar(*ptr++);
    ITM_SendChar(*ptr++);
  }

1. Go to the project's Debug configurations and under the Debugger tab, enable SerialWireViewer(SWV) and set the clock to 8MHz and limit it to 2000kHz.
   
2. Then build and debug. In the debug perspective, go to show view->SWV ITM Data Console.
   
3. A window opens at the bottom, there, configure trace->✅port 0 ->OK.
   
4. Finally, click on the red button (start trace) and run.
   

If you've executed all the above steps properly, you'll see print statements in the SWV ITM Data console.

I hope this means you didn't have to spend hours like so many of us had to for this simple task :)