B4R Library rRadioHead - RF95 / Default settings

If I look at the Arduino project 'rf95_client' it says:

// Defaults after init are 434.0MHz, 13dBm, Bw = 125 kHz, Cr = 4/5, Sf = 128chips/symbol, CRC on

In B4R I can change the frequency, but what are the other parameters ?

I would love the option to change these parameters from B4R (Please)