Cara menambah scroll pada kotak

Trik blog ,Bagi anda yang tidak ingin kotak komentarnya terlihat terlalu memanjang saya punya triknya.
Berikut caranya:

1.Masuk ke blogger
2.Pilih Rancangan (Dulu tata letak)
3.Klik edit html
4.Beri tanda centang pada Expand Template Widget
5.Cari kode berikut:

<dl class='commentlist'>
<b:loop values='data:post.comments' var='comment'>
<span><dt expr:class='&quot;comment-author &quot; + data:comment.authorClass' expr:id='data:comment.anchorName' style='display:inline'>
<a expr:name='data:comment.anchorName'/>
<b:if cond='data:comment.authorUrl'>
<a expr:href='data:comment.authorUrl' rel='nofollow'><data:comment.author/></a>
<b:else/>
<data:comment.author/>
</b:if>
<data:commentPostedByMsg/>
</dt>pada hari&#160;<dd class='comment-footer' style='display:inline; margin:0px'>
<span class='comment-timestamp'>
<a expr:href='data:comment.url' title='comment permalink'>
<data:comment.timestamp/>
</a>
<b:include data='comment' name='commentDeleteIcon'/>
</span>
<span><a expr:href='&quot;https://www.blogger.com/comment.g?blogID=2157145678768874645&amp;postID=&quot; + data:post.id + &quot;&amp;isPopup=true&amp;postBody=%40%3C%61%20%68%72%65%66%3D%22%23&quot; + data:comment.anchorName + &quot;%22%3E&quot; + data:comment.author + &quot;%3C%2F%61%3E#form&quot;' onclick='javascript:window.open(this.href, &quot;bloggerPopup&quot;, &quot;toolbar=0,location=0,statusbar=1,menubar=0,scrollbars=yes,width=450,height=450&quot;); return false;'><img alt='Balas Komentar' src='https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7a_KzWTHyGwtTpVZOnEDiGaGt3ag029feYQjPOGCVW5g91bhiW0nyu6N_vmTTeapNsHecslJlkSZ-zoo0i0BzjWXypfZFbSwM2Um5VUHOpxNUmJ2mvuhCoDSXpuZpoXQ-pQlZjbgiYoQ/s400/+-.bmp'/></a></span>
</dd></span>
<dd class='commenttext'>
<b:if cond='data:comment.isDeleted'>
<span class='deleted-comment'><data:comment.body/></span>
<b:else/>
<p><data:comment.body/></p>
</b:if>
</dd>
</b:loop>
</dl>

6.Hapus code diatas lalu diganti dengan kode berikut:

<div class='scrollbox' style='overflow:auto; height:310px;'>
<dl class='commentlist'>
<b:loop values='data:post.comments' var='comment'>
<span><dt expr:class='&quot;comment-author &quot; + data:comment.authorClass' expr:id='data:comment.anchorName' style='display:inline'>
<a expr:name='data:comment.anchorName'/>
<b:if cond='data:comment.authorUrl'>
<a expr:href='data:comment.authorUrl' rel='nofollow'><data:comment.author/></a>
<b:else/>
<data:comment.author/>
</b:if>
<data:commentPostedByMsg/>
</dt>pada hari&#160;<dd class='comment-footer' style='display:inline; margin:0px'>
<span class='comment-timestamp'>
<a expr:href='data:comment.url' title='comment permalink'>
<data:comment.timestamp/>
</a>
<b:include data='comment' name='commentDeleteIcon'/>
</span>
</dd></span>
<dd class='commenttext'>
<b:if cond='data:comment.isDeleted'>
<span class='deleted-comment'><data:comment.body/></span>
<b:else/>
<p><data:comment.body/></p>
</b:if>
</dd>
</b:loop>
</dl>
</div>

7.Simpan template

Sebagai contoh ini: