void AddAxisIfNotDefined(UInputSettings* Settings, TArray<FInputAxisKeyMapping> DefinedAxis, FInputAxisKeyMapping NewAxis)
{
	for(FInputAxisKeyMapping Action : DefinedAxis)
	{
		if(Action.AxisName == NewAxis.AxisName) return; //Dont Add
	}
	Settings->AddAxisMapping(NewAxis);
}

// E.g. in StartupModule
UInputSettings* Settings = UInputSettings::GetInputSettings();
const TArray<FInputAxisKeyMapping> DefinedAxis(Settings->AxisMappings);
AddAxisIfNotDefined(Settings, DefinedAxis, FInputAxisKeyMapping(TEXT("VRSimulatorRight"), EKeys::D, 1));
AddAxisIfNotDefined(Settings, DefinedAxis, FInputAxisKeyMapping(TEXT("VRSimulatorRight"), EKeys::A, -1));

Also interesting might be to only add Axis/Actions if they are not defined yet. ```cpp void AddAxisIfNotDefined(UInputSettings* Settings, TArray<FInputAxisKeyMapping> DefinedAxis, FInputAxisKeyMapping NewAxis) { for(FInputAxisKeyMapping Action : DefinedAxis) { if(Action.AxisName == NewAxis.AxisName) return; //Dont Add } Settings->AddAxisMapping(NewAxis); } // E.g. in StartupModule UInputSettings* Settings = UInputSettings::GetInputSettings(); const TArray<FInputAxisKeyMapping> DefinedAxis(Settings->AxisMappings); AddAxisIfNotDefined(Settings, DefinedAxis, FInputAxisKeyMapping(TEXT("VRSimulatorRight"), EKeys::D, 1)); AddAxisIfNotDefined(Settings, DefinedAxis, FInputAxisKeyMapping(TEXT("VRSimulatorRight"), EKeys::A, -1)); ``` If the user now changes the bindings, they are not forcefully added back on restart Note: The settings are not directly stored into the `DefaultInput.ini`, but in the `Saved/Config/Windows/Input.ini` and are copied over if changes are made in the editor UI *By Sebastian Pape on 2020-04-06T14:46:25 (imported from GitLab)*