Thicker lines in Levels, or colored Under-the-Curve area for better seeing

Is there any way to make color lines showing image levels thicker, or make the area under the curve solid-colored as it was in earlier versions of ACR? Level adjustment which I was using for every image previously became almost useless to me in two most recent ACR versions. Particularly with new 4k monitor and senilis eyes, I cannot adjust levels in such way that use all the dynamic range of image but still not clipped.