Quick question about picking UID

If I write, let's say " Sprite(5).X " in an expression, what does the (5) do ?

I was about sure it would pick the sprite with UID 5, but everything I've done proves it doesn't.

Since construct isn't throwing a syntax error at me, I assume it does mean something else, but what?

And then, is there a way to pick an UID directly in written expressions instead of events ?

That's picking the sprite with IID=5, in other words, the 6th sprite, out of however many are currently picked. You need to use the event to pick by UID.

It isn't the 6th sprite picked, it's the 6th sprite regardless.