How to toggle the aiming on PC?

I cannot find this option anywhere in the settings. Is anyone able to help?

What do you mean?

Instead of holding right click to aim, I would like to click it once and have it stayed zoomed without having to hold it down like other shooters I play.

Ah, I get ya. If it is available it will be marked with an option to toggle in the key bindings. If toggle isn’t mentioned I assume its not an option.