custom_pocket_containers.json

{
    "namespace" : "custom_pocket_containers",

    "custom_pocket_container_grid@common.container_grid": {
        "layer": 3,
        "$item_collection_name": "container_items",
        "grid_item_template": "common.pocket_ui_container_item"
    },

    "inventory_panel": {
        "type": "panel",
        //"size": [ "80%", "95%" ],
        "size": [ "84%", "95%" ], // change
        "anchor_to": "center",
        "anchor_from": "center",
        "controls": [
          {
            "scrolling_panel@common.scrolling_panel": {
              "$allow_scrolling_even_when_content_fits": false,
              "layer": 1,
              "$scrolling_pane_size": [ "100%", "100%-2px" ],
              //"$scrolling_content": "pocket_containers.inventory_grid",
              "$scrolling_content": "custom_pocket_containers.custom_pocket_container_grid", // change
              "$scroll_box_mouse_image_control": "common-classic.button_state_default",
              "$scroll_size": [ "8px", "100%" ]
            }
          }
        ]
    },

    "half_screen": {
        "type": "panel",
        "size": [ "50%", "100%-27px" ],
        "offset": [ 0, 27 ],
        "anchor_from": "top_left",
        "anchor_to": "top_left",
        "controls": [
            { "inventory_panel@inventory_panel": {} }
        ]
    },

    "panel": {
        "type": "panel",
        "controls": [
            { "container_gamepad_helpers@common.container_gamepad_helpers": { "layer": 3 } },
            //{ "header@header_area": { "layer": 2 } },
            { "header@pocket_containers.header_area": { "layer": 2 } }, // change
            //{ "bg@background_panel": { "layer": 0 } },
            { "bg@pocket_containers.background_panel": { "layer": 0 } }, // change
            {
                //"inventory@half_screen": {
                "inventory@pocket_containers.half_screen": { // change
                    "$container_size": 36,
                    "$pane_collection": "combined_hotbar_and_inventory_items"
                }
            },
            {
                "container@half_screen": {
                    "anchor_from": "top_middle",
                    "$pane_collection": "container_items"
                }
            },
            { "selected_item_details_factory@common.selected_item_details_factory": {} },
            {
                "item_lock_notification_factory@common.item_lock_notification_factory": {
                    "$offset": [ 0, "85%" ]
                }
            },
            { "gamepad_cursor@common.gamepad_cursor_button": {} },
            { "inventory_selected_icon_button@common.inventory_selected_icon_button": {} },
            { "hold_icon@common.inventory_take_progress_icon_button": {} },
            { "flying_item_renderer@common.flying_item_renderer": {} }
        ]
    }
}