How do I change behaviour params during gameplay

For context, I’m making a game for the Gdevelop game jam where the more collectables you gave, the more stable the player becomes, and one way I want to Implement this is by making the player slide a lot in the game, until a certain amount of the collectable gets collected, where a param in the platformer behaviour then gets changed to a different value, for the change to happen.

My problem is how exactly do I do that?

You can use actions on the platformer character.

Figured it out myself eventually, but thanks anyways.