chromium/chrome/browser/resources/ash/settings/os_a11y_page/captions_subpage.html

<style include="cr-shared-style settings-shared">
  .cr-row-no-top-gap {
    margin-bottom: var(--cr-section-vertical-margin);
    min-height: auto;
  }

  .preview-box {
    all: initial;
    align-items: center;
    background-image:
      url(chrome://theme/IDR_ACCESSIBILITY_CAPTIONS_PREVIEW_BACKGROUND);
    background-position: center;
    background-size: cover;
    border-radius: 4px;
    display: flex;
    justify-content: center;
    margin: var(--cr-section-padding);
    margin-inline-start: var(--cr-section-indent-padding);
    min-height: 112px;
    padding: 20px;
    text-align: center;
  }
</style>
<template is="dom-if" if="[[enableLiveCaption_]]">
  <settings-live-caption prefs="{{prefs}}"
      languages="[[languages]]"
      language-helper="[[languageHelper]]">
  </settings-live-caption>
</template>
<div class="cr-row">
  <h2 class="start">$i18n{captionsPreferencesTitle}</h2>
</div>
<div class="cr-row first cr-row-no-top-gap">
  <div class="start">$i18n{captionsPreferencesSubtitle}</div>
</div>
<div class="preview-box">
  <span style="
      font-size:[[prefs.accessibility.captions.text_size.value]];
      font-family:[[getFontFamily_(
          prefs.accessibility.captions.text_font.value)]];
      background-color: [[computeBackgroundColor_(
          prefs.accessibility.captions.background_opacity.value,
          prefs.accessibility.captions.background_color.value)]];
      color: [[computeTextColor_(
          prefs.accessibility.captions.text_opacity.value,
          prefs.accessibility.captions.text_color.value)]];
      text-shadow: [[prefs.accessibility.captions.text_shadow.value]];
      padding: [[computePadding_(
          prefs.accessibility.captions.text_size.value)]]">
    $i18n{quickBrownFox}
  </span>
</div>
<div class="list-frame">
  <div class="list-item underbar first">
    <div class="start cr-padded-text" aria-hidden="true">
      $i18n{captionsTextSize}
    </div>
    <settings-dropdown-menu id="captionsTextSize"
        label="$i18n{captionsTextSize}"
        pref="{{prefs.accessibility.captions.text_size}}"
        menu-options="[[textSizeOptions_]]">
    </settings-dropdown-menu>
  </div>
  <div class="list-item underbar">
    <div class="start cr-padded-text" aria-hidden="true">
      $i18n{captionsTextFont}
    </div>
    <settings-dropdown-menu id="captionsTextFont"
        label="$i18n{captionsTextFont}"
        pref="{{prefs.accessibility.captions.text_font}}"
        menu-options="[[textFontOptions_]]">
    </settings-dropdown-menu>
  </div>
  <div class="list-item underbar">
    <div class="start cr-padded-text" aria-hidden="true">
      $i18n{captionsTextColor}
    </div>
    <settings-dropdown-menu id="captionsTextColor"
        label="$i18n{captionsTextColor}"
        pref="{{prefs.accessibility.captions.text_color}}"
        menu-options="[[colorOptions_]]">
    </settings-dropdown-menu>
  </div>
  <div class="list-item underbar">
    <div class="start cr-padded-text" aria-hidden="true">
      $i18n{captionsTextOpacity}
    </div>
    <settings-dropdown-menu id="captionsTextOpacity"
        label="$i18n{captionsTextOpacity}"
        pref="{{prefs.accessibility.captions.text_opacity}}"
        menu-options="[[textOpacityOptions_]]">
    </settings-dropdown-menu>
  </div>
  <div class="list-item underbar">
    <div class="start cr-padded-text" aria-hidden="true">
      $i18n{captionsTextShadow}
    </div>
    <settings-dropdown-menu id="captionsTextShadow"
        label="$i18n{captionsTextShadow}"
        pref="{{prefs.accessibility.captions.text_shadow}}"
        menu-options="[[textShadowOptions_]]">
    </settings-dropdown-menu>
  </div>
  <div class="list-item underbar">
    <div class="start cr-padded-text" aria-hidden="true">
      $i18n{captionsBackgroundColor}
    </div>
    <settings-dropdown-menu id="captionsBackgroundColor"
        label="$i18n{captionsBackgroundColor}"
        pref="{{prefs.accessibility.captions.background_color}}"
        menu-options="[[colorOptions_]]">
    </settings-dropdown-menu>
  </div>
  <div class="list-item">
    <div class="start cr-padded-text" aria-hidden="true">
      $i18n{captionsBackgroundOpacity}
    </div>
    <settings-dropdown-menu id="captionsBackgroundOpacity"
        label="$i18n{captionsBackgroundOpacity}"
        pref="{{prefs.accessibility.captions.background_opacity}}"
        menu-options="[[backgroundOpacityOptions_]]">
    </settings-dropdown-menu>
  </div>
</div>