Tajima Dg/ml By Pulse 2009 How To Fit My Tajima DG/ML To Its Aspect Ratio?

How to fit my Tajima DG/ML to its aspect ratio? - tajima dg/ml by pulse 2009

I have a Tajima DG / ML V7. I use a widescreen monitor. The only problem is that when I appear Tajima elongated circle or an ellipse. But is it any session of Tajima. How do I solve this problem. Tajima, I can not upgrade to the latest version. Thank you very much