I just bought a fuji x-t4, and since it's my first fuji camera I'm still lost in the menus. I found the option where I can set if I want it to focus before shooting or shoot right away: It's called RELEASE/FOCUS PRIORITY and can be found in the AF/MF menu. Here's a reference: http://fujifilm-dsc.com/en/manual/x-t3/menu_shooting/af_mf_setting/index.html
Now how can I use a shortcut to quickly change it? I'm used to shoot a nikon camera where I've set up a shortcut to toggle this option when a "fn" button is pressed.