ktyr report

config/settings_schema.jsonへ下記を追記

[
  {
    "name": "xxx",
    "theme_name": "xxx",
    "theme_version": "xxx",
    "theme_author": "xxx",
    "theme_documentation_url": "https:\/\xxx",
    "theme_support_url": "https:\/\/yyy"
  }
//---------ここから---------
  ,{
    "name": "トップページ",
    "settings": [
      {
        "type": "image_picker",
        "id": "main_image",
        "label": "メイン画像",
        "info": "メイン画像です"
      }
    ]
  }
//--------ここまでを追記-----------
]

　
画像を表示したい場所へ下記コードを追記

{% if settings.main_image != blank %}<img src="{{ settings.main_image.src | image_url: width: 1040, format: 'pjpg' }}">{% endif %}