TImageEnMView.UpdateImage
 
Declaration
procedure UpdateImage(idx: Integer);
Description
Redraw the image, 
idx.
Whenever an image (Bitmap) within a TImageEnMView changes, you must update the component with 
Update or 
UpdateImage.
// Draw a rectangle on the fourth image
var
  bmp: TBitmap;
begin
  bmp := ImageEnMView1.GetBitmap(3);
  bmp.canvas.rectangle(0, 0, 10, 10);
  ImageEnMView1.ReleaseBitmap(3);
  UpdateImage(3);
end;