UTop/user_config/usr/share/utop/key-bindings.json

{
    "keybindings": {
        "help"           : "F1",
        "guake_key"      : "<Shift><Control>KP_Insert",
        "focus-search"   : "<Control>s",
        "focus-apps"     : "<Control>a",
        "focus-terminal" : "<Control>t"
    }
}