Add Levels to PL3

[MikeR]

There is some good discussion about Levels tool here:

Levels adjustment

Photo Lab does not have a specific Levels adjustment, or at least does not have one I could find when I looked. The closest thing I could find was the Tone Curve… Does adjusting the black and white ends of the Tone Curve do the same thing as adjusting the black and white levels? And does adjusting the middle of the Curve do the same thing as adjusting the Levels midpoint? Or are those adjustments different?