    "on": [
            { "trigger": "clear", "remove": true },
            { "trigger": "!shift", "remove": true },
            { "trigger": "!shift && clicked", "insert": "clicked" },
            { "trigger": "shift && clicked", "toggle": "clicked" }
          ]
        },
        {
          "name": "selected-depth-range",
          "source": "selected",
          "transform": [
            { "type": "aggregate", "fields": ["depth"], "ops": ["max"], "as": ["m"] }
          ]
        },
        {
        