An editing-style method for changing BackgroundBitmap.
procedure SetBackgroundImageEd(Graphic: TRVGraphic; AutoReformat: Boolean);
(introduced in version 15)
Parameters:
Graphic – a graphic to assign to BackgroundBitmap. If Graphic is not TBitmap, it is converted to TBitmap. After calling this method, the component uses a copy of Graphic, so you must free Graphic yourself.
If AutoReformat=True, Change is called. Normally, this method is called with AutoReformat=True if you change a single property. If you call this method together with other methods in a group, this parameter must be False, and you must call Change yourself.
Method type: 
editing-style (unlike direct assignment to BackgroundBitmap).
Example:
if MyRichViewEdit.CanChange then
begin
MyRichViewEdit.BeginUndoGroup(rvutBackground);
MyRichViewEdit.SetUndoGroupMode(True);
MyRichViewEdit.SetIntPropertyEd(rvipBackgroundStyle, Ord(bsTiled),
False);
MyRichViewEdit.SetBackgroundImageEd(Image1.Picture.Graphic, False);
MyRichViewEdit.SetUndoGroupMode(False);
MyRichViewEdit.Invalidate;
MyRichViewEdit.Change;
end;
See also methods: