// Rotate some of the images right (90° clockwise)
RotImages := [2, 4, 5];
for i := 0 to ImageEnMView1.ImageCount - 1 do
  if i in RotImages then
  begin
    bmp := ImageEnMView1.GetTIEBitmap( i );
    bmp.Rotate( 270 );
    ImageEnMView1.ReleaseBitmap( i, True );
  end;
ImageEnMView1.Update();

// Rotate selected images right (90° clockwise)
for i := 0 to ImageEnMView1.MultiSelectedImagesCount - 1 do
begin
  selIdx := ImageEnMView1.MultiSelectedImages[ i ];
  bmp := ImageEnMView1.GetTIEBitmap( selIdx );
  bmp.Rotate( 270 );
  ImageEnMView1.ReleaseBitmap( selIdx, True );
end;
ImageEnMView1.Update();

var
  i : Integer;
  bmp: TIEBitmap;
  lista : TIEArrayOfInteger;
begin
 lista := ImageEnMView1.MultiSelectedImagesList;
 for i := 0 to ImageEnMView1.MultiSelectedImagesCount - 1 do 
  begin
    bmp := ImageEnMView1.GetTIEBitmap( lista[i] );
    bmp.Rotate( 270 );
    ImageEnMView1.ReleaseBitmap( lista[i] , True );
  end;
  ImageEnMView1.Update();
end;