DRV8329: MOSFET & Gate resistor selection

Tool/software:

I need help to understand the Gate resistor calculator tool to select the Gate resistor configuration.

While using the tool i am only able to select the single gate resistor option, however other option to have Rsource, Rsing and diode is disabled.

Another question, this would help me to select the correct Rg based on the MOSFET, however what should be the selection parameter for the MOSFET