w3-panel クラスは、すべての種類のノート（注意書き）を表示するのに最適なクラスです。
London is the capital city of England. It is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
London is the capital city of England. It is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
London is the capital city of England. It is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-light-grey w3-border">
<p>London is the
most populous city in the United Kingdom,
with a metropolitan area
of over 9 million inhabitants.</p>
</div>
Try It Yourself ❯
ノートは、多くの場合、淡い色と色付きのバーで表示されます：
<div class="w3-panel w3-pale-blue w3-leftbar w3-border-blue">
<p>London
is the most populous city in the United Kingdom,
with a
metropolitan area of over 9 million inhabitants.</p>
</div>
Try It Yourself ❯