My Karabiner Complex Config

{
  "title": "Mine",
  "rules": [
    {
      "description": "Simultaneously press Up/Down + Right to get a PageUp/Down",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "simultaneous": [{"key_code": "up_arrow"}, {"key_code": "right_arrow"}],
            "modifiers": {"optional": ["any"]}
          },
          "to": [
            {"key_code": "page_up"}
          ]
        },
        {
          "type": "basic",
          "from": {
            "simultaneous": [{"key_code": "down_arrow"},{"key_code": "right_arrow"}],
            "modifiers": {"optional": ["any"]}
          },
          "to": [
            {"key_code": "page_down"}
          ]
        }
      ]
    },
    {
      "description": "Copy & Paste: Fn + C/V get Ctrl/Shift + Insert",
      "manipulators": [
        {
          "type": "basic",
          "from":{
              "key_code":"c",
              "modifiers":{ "mandatory":["fn"]}
          },
          "to":[
            {"key_code":"insert","modifiers":["left_control"]}
          ]
        },
        {
          "type": "basic",
          "from":{
              "key_code":"v",
              "modifiers":{ "mandatory":["fn"]}
          },
          "to":[
            {"key_code":"insert","modifiers":["left_shift"]}
          ]
        }
      ]
    }
  ]
}