What is the difference between using Fill Light and Blacks sliders and dealing with the Exposure slider directly in Adobe Photoshop Lightroom?
Exposure: Adjusts the entire image lighter or darker.
Fill Light: Lightens the dark regions to recover detail, but leaves the bright regions alone.
Blacks: Darkens the dark regions.
Recovery: Similar to fill, it attempts to recover detail in the bright regions, leaving the darker regions alone.