Change map settings in middle of the match, like a buttom

Greetiings

im a new map creator for fortnite and i have been learning about it

the question is : how can i create a buttom that allows me to enable or disable fall damge in the middle of the match?

Example

i have a 1v1 map, and i actually added sume buttoms like change the HP amounth in the middle of the match

so, how can i do it with the fall damage?? i have been searching but i dont find a topic or similar :frowning:

thanks!