How to indicate mlagents-learn which parameters to test

I am starting to discover ML-Agents in Unity, and have some working code with a cube moving in 2d. I have now implemented the detection of space key for the cube to jump. I would like to instruct mlagents-learn to test this space-key during simulation, or any other parameter. Where should this be done so that the ActionBuffers array gets properly filled?

Solution

OK, found it. I need to use a discrete branch with size of 2 (for ones and zeros), then apply it as jump.

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