InputMapperOptionsholdDurationToMapKeyboardModifierKeyAsPrimary Property

If both allowKeyboardKeysWithModifiers and allowKeyboardModifierKeyAsPrimary are true, the modifier key must be held down for this duration in seconds before it will be accepted as a primary key assignment. This is used to allow the user to be able to map modifier key + key combinations while also allowing them to map modifier keys as the primary key.

public float holdDurationToMapKeyboardModifierKeyAsPrimary { get; set; }