chrome/browser/resources/print_preview/ui/margin_control_container.html

<style>
  :host {
    display: block;
    left: 0;
    position: absolute;
    top: 0;
  }

  :host([dragging_=dragging-vertical]) {
    cursor: ns-resize;
  }

  :host([dragging_=dragging-horizontal]) {
    cursor: ew-resize;
  }
</style>
<template is="dom-repeat" items="[[marginSides_]]">
  <print-preview-margin-control side="[[item]]" invisible="[[invisible_]]"
      disabled="[[controlsDisabled_(state, invisible_)]]"
      translate-transform="[[translateTransform_]]"
      clip-size="[[clipSize_]]"
      measurement-system="[[measurementSystem]]"
      scale-transform="[[scaleTransform_]]"
      page-size="[[pageSize]]"
      on-pointerdown="onPointerDown_"
      on-text-change="onTextChange_" on-text-blur="onTextBlur_"
      on-text-focus="onTextFocus_" on-transition-end="onTransitionEnd_">
  </print-preview-margin-control>
</template>