VIPR SRM – How do I change thickness line for a threshold line on graphics report?

Hello:

This is my first time posting.

Screenshot-1 (see attachment) shows a report that I need to modify.

As you can tell, there are two threshold dotted lines, one at 60 and one at 80.

I am able to change the color on the said lines, but not the thickness.

Does anybody know of a way to accomplish this; i.e., how to change the thickness on the threshold lines?

Screenshot-2 shows where to modify the color.

However, there is no provision to change the thickness and make it thicker for better visibility.