How do I warn the player of an attack coming from outside the window

Hello,

I have a layout twice bigger than my window, so you often can't see all of the enemies. When an enemy launch a big attack, I want the player to be informed of it with an exclamation point (!) or something, so WITHIN the window, at a relative X and Y position.

So if the enemy is left to the window, the warning sign should get the same Y position, but have a X position right to the enemy, visible by the player.

I've tried lots of expressions, like "viewport", but I can't get a satisfying result. Could someone give me a hand?

Many thanks.

(ViewportLeft(n)+10) or (ViewportRight(n)-10) should work, where "n" is layer number and "10" is a small offset/padding from the edge of the screen.

Choose a layer with 100% parallax and scale.

Thanks, but it works only with the X coordinates alone. If I try to retrieve X and Y, the sprite sometimes disappears and sometimes it's stuck in the corner of the screen.

Do you have layers with different parallax?

It will be easier to help if you could post your capx.