This can be the name of one of the UISchemes as it is defined in the registry. This scheme is used as default (if in local or global registry) or it stores the name of the UIScheme the user has selected (if the value is in the user registry).
If no UIScheme is defined at all, DigAIRange will use the internal UIScheme "UIScheme_light" by default.
Possible values:
Default value: