Screens outside of the Stack Navigator not working

If I have screen 1 outside of my stack navigator. how do I link it to the other 4 screen that is inside the stack… Because when I go to the screen 1 and click the button so it will go to one of the screen on the stack . It doesnt do it. I did use the block saying when home click navigate to screen2 but still doesnt do it. Now if I add the screen 1 inside the stack it works perfect.