When we added remapping to our game most tutorials only showed how to replace all current inputs with a single option per Input Action. If you just go with only one input per Action, then it is pretty easy. You can just clear all current inputs, then add your new one. If you want to allow the player to set multiple, then it needs a bit more work. You can't just swap one out, but need to erase all current ones for an Action, and then add each input you want it to have. You can look at the docs for InputMap to see the functions for remapping. We used a Window and the window_input Signal to get the new input.