How to add snippets of your post on blogger

Log into your control panel ->  edit HTML -> back up your blog before you make any changes

find the following :

<data:post.body />

replace it with


<b:if cond='data:blog.pageType != "item"'>
          <b:if cond='data:post.snippet'>
          <b:if cond='data:post.thumbnailUrl'>
              <div class='Image thumb'>
                <img expr:src='data:post.thumbnailUrl'/>
              </div>
          </b:if>
            <data:post.snippet/>
    <b:if cond='data:post.jumpLink != data:post.hasJumpLink'>
      <div class='jump-link'>
        <a expr:href='data:post.url + "#more"' expr:title='data:post.title'><data:post.jumpText/></a>
      </div>
    </b:if>
          <b:else/>
            <data:post.body/>
          </b:if>
      <b:else/>
      <data:post.body/>
      </b:if>