Karabiner Elements

arrows_to_hjkl.json

{
    "description": "Change fn+hjkl to arrow keys",
    "manipulators": [
        {
            "from": {
                "key_code": "h",
                "modifiers": {
                    "mandatory": [
                        "fn"
                    ],
                    "optional": [
                        "any"
                    ]
                }
            },
            "to": [
                {
                    "key_code": "left_arrow"
                }
            ],
            "type": "basic"
        },
        {
            "from": {
                "key_code": "j",
                "modifiers": {
                    "mandatory": [
                        "fn"
                    ],
                    "optional": [
                        "any"
                    ]
                }
            },
            "to": [
                {
                    "key_code": "down_arrow"
                }
            ],
            "type": "basic"
        },
        {
            "from": {
                "key_code": "k",
                "modifiers": {
                    "mandatory": [
                        "fn"
                    ],
                    "optional": [
                        "any"
                    ]
                }
            },
            "to": [
                {
                    "key_code": "up_arrow"
                }
            ],
            "type": "basic"
        },
        {
            "from": {
                "key_code": "l",
                "modifiers": {
                    "mandatory": [
                        "fn"
                    ],
                    "optional": [
                        "any"
                    ]
                }
            },
            "to": [
                {
                    "key_code": "right_arrow"
                }
            ],
            "type": "basic"
        }
    ]
}