winter/modules/cms/classes/layout/fields.yaml

fields:
  fileName:
    label: cms::lang.editor.filename
    span: left
    attributes:
      default-focus: 1

  settings[description]:
    label: cms::lang.editor.description
    span: right

  toolbar:
    type: partial
    path: layout_toolbar
    cssClass: collapse-visible

  components: Cms\FormWidgets\Components

secondaryTabs:
  stretch: true
  fields:
    markup:
      tab: cms::lang.editor.markup
      stretch: true
      type: codeeditor
      language: twig

    code:
      tab: cms::lang.editor.code
      stretch: true
      type: codeeditor
      language: php