How to reduce waveform volume at certain spots on trackview?

I know how to use envelopes and gain increase/decrease but I was wondering if one can simply find a "too loud" section, split the track just before and just after the too loud section and then simply reduce the overall volume by dragging the top of the track downward like I can do in my Sony (Magix) Vegas video software and like I think Protools can do? I know I can do a ramp-up or ramp-down by dragging out the little triangles in the upper corners of clips but there doesn't seem to be a way of dragging on the track to do this process. Maybe that function was added to recent updates that I missed out on. I have Platinum but my updates ended March 2017.

The other way is to go to "process" menu, then "audio" and then gain. Note that applying this on a portion of audio clip:
1) you might have less precision to balance the portion gain with the remaining parts of the clip;
2) this process is destructive.
 
The Skook link describes the better way to operate.

Actually, the fade tools with the little triangles perform almost exactly like I want but they only do fades (in or out). I was hoping there was a way to do that with the tool and do it "horizontally" across an entire clip and see the waveform shrink and/or expand while I moved the tool up and down in trackview. Anyway to do this?