There is a behavior in my mac that I'm trying to disable.

When I'm in any text editor and typing a key combination using the `alt`/`option`+any letter, the output will be special characters.

*For example:*  

the combination `alt+a` will generate `å`.  

the combination `alt+x` will generate `≈`.

I want to cancel this behavior.  

I'm a programmer and when I use my code editor I want to map some keybinding (keyboard shortcuts) to the `alt` key (`⌥+a` for example) but when I do that it doesn't execute because it generates the special characters.  

I guess that the special character has a priority over my code editor shortcuts.

Do you know how can I disable this default behavior?

Thank you