Viewport pixel probe values display

So in Nuke, when you have a viewer open, the values of the pixel directly under your mouse is displayed in the viewer at all times. It is incredibly handy. Im not sure if theres a current way to display values of the eye dropper in substance painter in real time, but I think it would be incredibly handy when painting height maps and well any map to know the values of the textures. Its hard to tell sometime if im clipping at 1.0 as a value or for height maps what the value of an area is if its negative. I know you can change the display options to see negative values.

Basically i want to see the value of the layer's pixels where ever my mouse is displayed on the screen.

You can see in this image of nuke the RGB colored numbers under the viewer.