Engine settings is a python file where developers can set various properties of a particular roar. File is called:
Some properties are obligatory where on the other hand there are also those which are totally optional. Be aware that required preferences have also default values.
This documentation is meant for developers to understand what all can be set in engine settings.
Third party developers currently don't have access to this file via their external beta, because they can drastically corrupt the site. If you need any change please ask support team to update your engine settings file.