Add new custom board

[BarryAbrams]

I'd like to add new board, a custom one i've made. Are there any resources for how I can add it to my local platform.io board library?

[metehoca]

Me too. I need 'only' 2, 8 and 16mb options and 'only' select cpu frequencies for my custom board. But i can't manage it actually. Some documentation would really help.