Code

	  private void flowChart1_BoxClicked(object sender, BoxMouseArgs e)
	  {

		RectangleF rect1 = new RectangleF();

		rect1.Location = e.Box.BoundingRect.Location;
		rect1.Size = e.Box.BoundingRect.Size;

		flowChart1.Bounds = Rectangle.Round(rect1);

		FormClip frmclip = new FormClip();
		frmclip.overview1.Document = flowChart1;
		// fitall
		frmclip.overview1.FitAll = true;
		// save scale factor
		float sf1=frmclip.overview1.ScaleFactor;
		// recover bounds
		frmclip.overview1.FitAll = false;
		frmclip.overview1.Bounds = Rectangle.Round(rect1);
		// recover scale factor
		frmclip.overview1.ScaleFactor = sf1;

		frmclip.Show();

	  }
 

Code

  private void flowChart1_BoxClicked(object sender, BoxMouseArgs e)

  {



RectangleF rect1 = new RectangleF();



rect1 = e.Box.BoundingRect;


rect1.Inflate(100, 100);



RectangleF rr = flowChart1.DocExtents;


flowChart1.DocExtents = Rectangle.Round(rect1);





FormClip frmclip = new FormClip();


frmclip.overview1.Document = flowChart1;





frmclip.overview1.FitAll = true;



float sf1=frmclip.overview1.ScaleFactor;



frmclip.overview1.FitAll = false;


frmclip.overview1.Bounds = Rectangle.Round(rect1);



frmclip.overview1.ScaleFactor = sf1;




frmclip.Show();



// UnRemarking Here is 2nd After result


//flowChart1.DocExtents = rr;

  }