Redneck Dude: I don't get those sliders or options in the theme I'm using (sublime).
Instead, I only get the colors that you should below the sliders.
In the Transparency Settings panel, I only get three sliders: start menu, task bar, and window borders.
I see nothing that allows me to change the transparency of the window client area.
UPDATE: did some more "exploring" and DID find the panel you show -- but I moved the sliders all the way to the left, clicked Apply Style, and it makes no difference -- except in Windows Explorer. Was really hoping to change client area transparency in general.