Instructs to exchange left and right margins on even pages.
property MirrorMargins: Boolean;
If MirrorMargins = True, then:
•for odd pages, LeftMargin defines the left margin, RightMargin defines the right margin; for even pages, LeftMargin defines the right margin, RightMargin defines the left margin;
•if page numbering is visible, left and right alignment of page numbers are exchanged on even pages.
This property can be changed as an editing (undoable) operation, see TSRichViewEdit.SetIntPropertyEd.