Hello Sergey,
you can put on odd pages margins aligned to the left, and in the even pages aligned to the right?
It would be a kind of independent margin alignment.
In TRichView:
MirrorMargins can be found in TRVPrint.
Also, there is TRichView.DocParameters.MirrorMargins, this property can be saved in RVF, RTF and DocX.
In ScaleRichView:
MirrorMargins can be found in TSRichViewEdit.PageProperty.
This is a very old version.
I checked a version log.
MirrorMargins was implemented in v4.5. FacingPages was added in the same version (as reserved for future), but its functionality was implemented in version 6.