Karabiner Elements Copy + Paste shortcuts

F4 = Command+C then Escape.json

{
    "description": "F4 = Command+C then Escape",
    "manipulators": [
        {
            "from": { "key_code": "f4" },
            "to": [
                {
                    "key_code": "c",
                    "modifiers": ["left_command"]
                }
            ],
            "to_delayed_action": { "to_if_invoked": [{ "key_code": "escape" }] },
            "type": "basic"
        }
    ]
}

F5 = Command+A then Command+V.json

{
    "description": "F5 = Command+A then Command+V",
    "manipulators": [
        {
            "from": { "key_code": "f5" },
            "to": [
                {
                    "key_code": "a",
                    "modifiers": ["left_command"]
                }
            ],
            "to_delayed_action": {
                "to_if_invoked": [
                    {
                        "key_code": "v",
                        "modifiers": ["left_command"]
                    }
                ]
            },
            "type": "basic"
        }
    ]
}