# 要点详解 在HTML视图中,选中内容,点击“上标” 或“下标” ,即可设置为上下标。 # 视频讲解 <video width="90%" controls=""><source src="http://other.iremaker.com/ff8ec83255b1a1a49f780dd811726547a93450a8d1e96178477c3ff62d91d36e.mp4?v=lvgC0fVUzK" type="video/mp4">您的浏览器不支持 video 标签。</video>