How to use XML file from Pinout Designer for further software development

I want to design my own carrier board for VF61 and I need to use two i2c and four USART in it. So for the software development, I downloaded Pinout designer and I can save the configuration to XML file. Please help me to know the further steps for making this changes to the SOM.

The Pinout Designer tool helps you finding the right pins for your setup. Currently there is no other functionality connected to the Pinout Designer. You have to do the changes to your system in software “manually”. Please note, we recommend to use our standard pinout as much as possible to minimize software changes.
If you need help with assigning the pins to the right functions in software, please create another question asking specifically for this and also letting us know more details about it, including the operating system you are using.