XMove X,Y relative to current X,Y Mouse position

Meanwhile here is a “second-best” solution that does not use visionLimitSearchArea. Instead it uses @0.8#3 to select the 3rd slider (“Warmth”).

    {
      "Name": "slider",
      "CreationDate": "2021-4-26",
      "Commands": [
        {
          "Command": "open",
          "Target": "https://ionicframework.com/docs/v3/demos/src/range/www/?production=true&ionicplatform=ios",
          "Value": ""
        },
        {
          "Command": "comment",
          "Target": "click // xpath=//ion-list[2]",
          "Value": ""
        },
        {
          "Command": "comment",
          "Target": "visionLimitSearchArea // element:xpath=xpath=//ion-list[2]",
          "Value": ""
        },
        {
          "Command": "XMove",
          "Target": "ball_dpi_168.png@0.8#3",
          "Value": "#down"
        },
        {
          "Command": "echo",
          "Target": "Starting point: x=${!imagex} y=${!imagey}",
          "Value": "green"
        },
        {
          "Command": "store",
          "Target": "${!imagex}",
          "Value": "x"
        },
        {
          "Command": "store",
          "Target": "${!imagey}",
          "Value": "y"
        },
        {
          "Command": "executeScript_Sandbox",
          "Target": "return Number (${x}) +300",
          "Value": "x"
        },
        {
          "Command": "XMove",
          "Target": "${x},${y}",
          "Value": "#up"
        }
      ]
    }