If you are using a popular blogging platform or publishing tool like TypePad, Wordpress, or Blogger, you likely publish a feed automatically. You can manage your blog feeds, using the free services been provided by Feedburner. FeedBurner's services allow publishers who already have a feed to improve their understanding of and relationship with their audience.
By default, subscribers to your blog's feed will likely be able to read the full content of your blog posts without visiting your blog. Well, if not satisfied with this, you can offer a short summary of your hyperlink-free content and direct your subscribers to your Web site for the rest of the story.
If you've burned your post feed with FeedBurner, there is a 'summary' setting which, if enabled, may affect the display of your feed for the Until Jump Break option. To activate it, sign in to feedburner, go to the "Optimize" tab, click "Summary Burner" and activate the service.
How Do I Add Read More To The Feed of My Blogger Blog?
If you are using Blogspot/Blogger as your blogging platform or publishing tool, even without burning your feed with Feedburner, you can change your feed settings via the Blogger dashboard.
To change your the feed settings of your Blogger blog,
==> Sign in to www.blogger.com
==> Go to "Settings" > "Other".
Here, you can select how much of your content you want to syndicate.
"Full" will put the entire content of each post in your site feed, while "Short" only includes an excerpt from the beginning of each post. Select "Until Jump Break" to show all post content before your jump break. The "None" option turns your site feed off entirely. For more advanced options, you can select "Custom."
Hence, to add read more, select the "Until Jump Break" option. This will make your posts to be displayed as seen in the screenshot above, with a read more link, which when clicked, will take your subscribers to your blog.
Yiu can confirm the change via your browser (Mozilla Firefox recommended) at : http://www.ogbongeblog.blogspot.com/feeds/posts/default?alt=rss (Replace ogbongeblog.blogspot.com with the URL of your blogspot blog).