Apex Legends aim?

With apex it is the case that when you press the left mouse button you are in aiming and you have to press it again to get it out again. My question is whether you can change it so that you have to hold down the left mouse button to aim, e.g. As with battelfront 2 or fortnite.

In Apex you aim with the right mouse button and shoot with the left! But good.

I'm pretty sure you can't change that. These are just basics!