hmm ok so how do I increase the size of the hitbox and the graphical effect?
To change the size of a hitbox, just edit the size parameter. It’s labeled there in the screenshot. You’ll also probably want to change other settings, like damage, knockback, and angle. In addition, the “synchronous timer” and the “Terminate collisions” event will create a timer for how long the hitbox stays open.
Changing the size of GFX isn’t possible without code, but
swapping out the ID will change the effect to something else. You can also stack a new GFX on top of the existing effects if you replace one of the hitboxes. If you use a loop and a GFX with scatter on it, you can sort of create the illusion of a bigger effect.
Try experimenting. Here's an example: