How to subtract numbers from health count?

hello,

I want it so when the player collides with an enemy, it subtracts from the health counter.

I am aware that you have to use a Global Variable, but how exactly do I do it?

Thanks in advance!

Create a global variable at the start of the event sheet. When the player collides with the enemy, use the action System - Select Subtract From - Select the global variable you created which stores the health value - Mention in the value field the number you want to deduct from the players health.