Radial Filters - No Whites or Blacks

I have begin using radial filters to apply selective lighting/exposure to portions of my pictures.  I recently watched a tutorial on this concept (Dodge & Burning) and according to the video I watched you should increase the exposure slightly, and apply whites.  When I select radial filter whites are not an available option, they are in the panel below which effects the entire picture, not what's in the radial filter.  I'm using Lightroom v. 6.10.

Any comments or suggestions on this are welcome.  Thanks!!