Eject Key - Capture Screen - Rules for Karabiner-Elements.json

{
  "title" : "Eject Key - Capture Full Screen | Hold - Selection",
  "rules" : [
    {
      "description" : "Eject Key - Capture Full Screen | Hold - Selection",
      "manipulators" : [
        {
          "from" : {
            "consumer_key_code":"eject"
          },
          "parameters" : {
            "basic.to_if_alone_timeout_milliseconds" : 300,
            "basic.to_if_held_down_threshold_milliseconds" : 500
          },
          "to_if_alone" : [
            {
              "shell_command": "osascript -e 'do shell script \"screencapture -m -p\"'"
            }
          ],
          "to_if_held_down" : [
            {
              "shell_command": "osascript -e ' do shell script \"screencapture -i -p\"'"
            }
          ],
          "type" : "basic"

        }
      ]
    }
  ]
}