Option "TwinView" "boolean"
Enable or disable TwinView. Please see APPENDIX I for
details. Default: TwinView is disabled.
Option "TwinViewOrientation" "string"
Controls the relationship between the two display devices
when using TwinView. Takes one of the following values:
"RightOf" "LeftOf" "Above" "Below" "Clone". Please see
APPENDIX I for details. Default: string is NULL.