Answered
Unable to add points on Tone curve.
I'm using LrC version 10.1, I don't have the option (button) to add points on the Tone Curve.
I'm using LrC version 10.1, I don't have the option (button) to add points on the Tone Curve.
It's the second button from the left.
Doesn't your Tone curve panel look this?

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