Getting the Alt/Opt key

I need to get the alt/option key to be “pressed”.
For example when dragging the black point in a levels layer while holding alt, the canvas will show clipping pixels. I tried to capture it with Occultist/action or Alchemist but had no luck. Anyone?

I don’t think that this one has batchPlay. But e.g. alt+click on layer visibility has.

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Thanks, i feared that. What a pity.