Karabiner-Elements configuration to change numbers with both shift keys if pressed with both shift keys

both-shifts-keypad.json

{
  "title": "Both shifts + numbers => Keypad numbers",
  "rules": [
    {
      "description": "Both shifts + 1 => Keypad 1",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "1",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_1"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 2 => Keypad 2",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "2",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_2"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 3 => Keypad 3",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            },
            "key_code": "3"
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_3"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 4 => Keypad 4",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "4",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_4"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 5 => Keypad 5",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "5",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_5"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 6 => Keypad 6",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "6",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_6"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 7 => Keypad 7",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "7",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_7"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 8 => Keypad 8",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "8",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_8"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 9 => Keypad 9",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "9",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_9"
            }
          ]
        }
      ]
    },
    {
      "description": "Both shifts + 0 => Keypad 0",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "key_code": "0",
            "modifiers": {
              "mandatory": [
                "left_shift",
                "right_shift"
              ]
            }
          },
          "to": [
            {
              "repeat": true,
              "key_code": "keypad_0"
            }
          ]
        }
      ]
    }
  ]
}

For sign keys:

• https://gist.github.com/gh640/272b3b479418b27f1f290058fe0395b5