Multi-rotor Motor Mixing and why it's important- This post explains how to build a custom motor mix for your multi-rotor in Baseflight and Cleanflight and why every serious pilot should do so. :
How to Setup Reversed Propellers | GetFPV Learn
How to Setup Betaflight Firmware - Oscar Liang
Motors Tab | Betaflight
How To Swap Motors | Motor Remapping in Betaflight/Emuflight | English Version - YouTube